A person dressed as U.S. President Donald Trump holds a fake hormones injection in front of a person dressed as a cow, during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls

A person dressed as U.S. President Donald Trump holds a fake hormones injection next to people dressed as a cow and chickens, during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls TPX IMAGES OF THE DAY

A person dressed as U.S. President Donald Trump holds a fake hormones injection during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls

A person dressed as U.S. President Donald Trump holds a fake hormones injection next to a person dressed as a cow, during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls

A person dressed as U.S. President Donald Trump holds a fake hormones injection next to people dressed as a cow and chickens, during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls

A person dressed as U.S. President Donald Trump holds a fake hormones injection during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls

A person dressed as U.S. President Donald Trump holds a fake hormones injection next to a person dressed as a cow, during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls

A man dressed as U.S. President Donald Trump holds a fake hormones injection next to a person dressed as a cow, during a demonstration ahead of the U.S. presidential election, in London, Britain October 24, 2020. REUTERS/Peter Nicholls

A nurse prepares a hormone blocker for transgender teenager Gabriel Diaz de Tudanca, 16, at a health-care centre in Madrid, Spain, December 16, 2015. Diaz de Tudanca was three years old when he returned one day from school and told his mother he was a boy and he wanted to be called Oscar. No one made anything out of it until years later he came out as a transgender man, first to his inner circle of friends and then to his parents, who have been very supportive of his transition and have helped him face all the social, legal and medical challenges that have have come with his decision to be true to himself. REUTERS/Susana Vera SEARCH "VERA GABRIEL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. THE IMAGES SHOULD ONLY BE USED TOGETHER WITH THE STORY - NO STAND-ALONE USES

Gabriel Diaz de Tudanca is a 19-year-old Spaniard who, although born a girl, identified as male from early childhood. "When I was three years old I came back from school and said to my mother that when I grew up I was going to be a man called Oscar," he says. Supported by his family and friends, he has undergone surgery and hormone treatments, changed his name and renewed his identity documents to reflect what he feels is his true gender. Reuters photographer Susana Vera accompanied him for three years through his process of change. REUTERS/Susana Vera SEARCH "VERA GABRIEL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: SPAIN-LGBT/ THE IMAGES SHOULD ONLY BE USED TOGETHER WITH THE STORY - NO STAND-ALONE USES

Transgender teenager Gabriel Diaz de Tudanca, 16, is examined by plastic surgeon Jorge Planas as he searches for a surgeon to carry out his female to male chest reconstruction surgery in Madrid, Spain, November 23, 2015. "Once I came out as a trans boy both socially and with my family, my main objective was to get started with the hormones and go through the chest reconstruction surgery. I really disliked that part of my body," Diaz de Tudanca said. REUTERS/Susana Vera SEARCH "VERA GABRIEL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. THE IMAGES SHOULD ONLY BE USED TOGETHER WITH THE STORY - NO STAND-ALONE USES

Transgender teenager Gabriel Diaz de Tudanca, 17, shaves his face to grow more hair two months after he started taking testosterone in Madrid, Spain, February 15, 2016. "I took hormone blockers for three months and was soon started on testosterone. My period stopped right away and that made me very happy, I really disliked it," Diaz de Tudanca said. REUTERS/Susana Vera SEARCH "VERA GABRIEL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. THE IMAGES SHOULD ONLY BE USED TOGETHER WITH THE STORY - NO STAND-ALONE USES

Mohamed Hagras, 31, uses hormones of queen bees at his performance of the "Beard of Bee" before the upcoming Egyptian Agricultural Carnival of Beekeeping in his farm at Shebin El Kom city in the province of Al- Al-Monofyia, northeast of Cairo, Egypt November 30, 2016. Picture taken November 30, 2016. REUTERS/Amr Abdallah Dalsh

Thalia Ainsley, 67, who began hormone therapy last year to biologically transition to womanhood, at Orlando?s GLBT Community Center of Central Florida in Orlando, Florida, U.S. on June 17, 2016. REUTERS/Julia Harte

Thalia Ainsley, 67, who began hormone therapy last year to biologically transition to womanhood, at Orlando?s GLBT Community Center of Central Florida in Orlando, Florida, U.S. on June 17, 2016. REUTERS/Julia Harte

Estradiol, an oral Estrogen hormone, used by Kate Lynn Blatt, a transgender woman, is seen at her home in Pottsville, Pennsylvania, United States, May 26, 2016. REUTERS/Shannon Stapleton THE IMAGES SHOULD ONLY BE USED TOGETHER WITH THE STORY - NO STAND-ALONE USES. SEARCH "KATE LYNN BLATT" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES

Pedestrians walk past environmental activists carrying a giant inflatable chicken during a demonstration against 'chlorine chickens' near the Oktoberfest grounds in Munich October 1, 2014. The protest is against the planned Free Trade Agreements TTIP (Transatlantic Trade and Investment Partnership) and CETA (Comprehensive Economic and Trade Agreement) with the U.S. and Canada, which opponents fear will allow U.S. chlorine-washed chicken and hormone treated meat into the EU. The so-called chlorine chicken has become a symbol of the health risks opponents say the free trade agreements represent. REUTERS/Michaela Rehle (GERMANY - Tags: FOOD POLITICS)

Environmental activists carry a giant inflatable chicken as the demonstrate against 'chlorine chickens' near the Oktoberfest grounds in Munich October 1, 2014. The protest is against the planned Free Trade Agreements TTIP (Transatlantic Trade and Investment Partnership) and CETA (Comprehensive Economic and Trade Agreement) with the U.S. and Canada, which opponents fear will allow U.S. chlorine-washed chicken and hormone treated meat into the EU. The so-called chlorine chicken has become a symbol of the health risks opponents say the free trade agreements represent. REUTERS/Michaela Rehle (GERMANY - Tags: FOOD POLITICS TPX IMAGES OF THE DAY)

Environmental activists carry a giant inflatable chicken as the demonstrate against 'chlorine chickens' near the Oktoberfest grounds in Munich October 1, 2014. The protest is against the planned Free Trade Agreements TTIP (Transatlantic Trade and Investment Partnership) and CETA (Comprehensive Economic and Trade Agreement) with the U.S. and Canada, which opponents fear will allow U.S. chlorine-washed chicken and hormone treated meat into the EU. The so-called chlorine chicken has become a symbol of the health risks opponents say the free trade agreements represent. REUTERS/Michaela Rehle (GERMANY - Tags: FOOD POLITICS TPX IMAGES OF THE DAY)

Petra van Dijk, 51, walks along the Amstel after changing her officially registered gender from male to female at the City Hall, in Amsterdam July 1, 2014. Dijk is among the first to obtain new documents on Tuesday, when a new law came into effect, legalising the registration of a transgender person's preferred gender in official state documents, including identity cards and passports. It eliminates the previous law, which required hormonal treatment, surgery or sterilization before any change in gender registration is allowed. REUTERS/Cris Toala Olivares (NETHERLANDS - Tags: SOCIETY LAW)

Damian Jackson (C), 51, shows family members his new documents after changing his officially registered gender from female to male, in the City Hall in Amsterdam July 1, 2014. Jackson is among the first to obtain new documents on Tuesday, when a new law came into effect, legalising the registration of a transgender person's preferred gender in official state documents, including identity cards and passports. It eliminates the previous law, which required hormonal treatment, surgery or sterilization before any change in gender registration is allowed. REUTERS/Cris Toala Olivares (NETHERLANDS - Tags: SOCIETY LAW)

Petra van Dijk, 51, signs documents as she changes her officially registered gender from male to female, in the City Hall in Amsterdam July 1, 2014. Dijk is among the first to obtain new documents on Tuesday, when a new law came into effect, legalising the registration of a transgender person's preferred gender in official state documents, including identity cards and passports. It eliminates the previous law, which required hormonal treatment, surgery or sterilization before any change in gender registration is allowed. REUTERS/Cris Toala Olivares (NETHERLANDS - Tags: SOCIETY LAW)

Damian Jackson (L), 37, and Petra van Dijk (R), 51, enter the City Hall to change the gender section on their official documents, in Amsterdam July 1, 2014. Jackson changed his officially registered gender from female to male while Dijk changed hers from male to female. They are among the first to obtain new documents on Tuesday, when a new law came into effect, legalising the registration of a transgender person's preferred gender in official state documents, including identity cards and passports. It eliminates the previous law, which required hormonal treatment, surgery or sterilization before any change in gender registration is allowed. REUTERS/Cris Toala Olivares (NETHERLANDS - Tags: SOCIETY LAW)

Damian Jackson (front L), 37, and Petra van Dijk (front R), enter the City Hall to change the gender section on their official documents, in Amsterdam July 1, 2014. Jackson changed his officially registered gender from female to male while Dijk changed hers from male to female. They are among the first to obtain new documents on Tuesday, when a new law came into effect, legalising the registration of a transgender person's preferred gender in official state documents, including identity cards and passports. It eliminates the previous law, which required hormonal treatment, surgery or sterilization before any change in gender registration is allowed. REUTERS/Cris Toala Olivares (NETHERLANDS - Tags: SOCIETY LAW)

Petra van Dijk, 51, displays her new documents after changing her officially registered gender from male to female, in the City Hall in Amsterdam July 1, 2014. Dijk is among the first to obtain new documents on Tuesday, when a new law came into effect, legalising the registration of a transgender person's preferred gender in official state documents, including identity cards and passports. It eliminates the previous law, which required hormonal treatment, surgery or sterilization before any change in gender registration is allowed. REUTERS/Cris Toala Olivares (NETHERLANDS - Tags: SOCIETY LAW)

Randy Schekman, professor of molecular and cell biology at the University of California at Berkeley, arrives for a press conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: HEALTH EDUCATION)

Nicholas B. Dirks, chancellor at the University of California at Berkeley, speaks during a news conference for Nobel medicine prize winner Randy Schekman in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: EDUCATION SCIENCE TECHNOLOGY HEALTH HEADSHOT)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, conducts a lecture at Yale in New Haven, Connecticut October 7, 2013. Students also encircled Rothman's podium with trophies ahead of his arrival in celebration of the award. Rothman was one of three U.S.-based scientists who won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY PROFILE TPX IMAGES OF THE DAY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, takes questions from students during to a class at Yale in New Haven, Connecticut October 7, 2013. Students also encircled Rothman's podium with trophies ahead of his arrival in celebration of the award. Rothman was one of three U.S.-based scientists who won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, pulls a medal over his head, which was given to him by his students, before speaking to a class at Yale in New Haven, Connecticut October 7, 2013. Students also encircled Rothman's podium with trophies ahead of his arrival in celebration of the award. Rothman was one of three U.S.-based scientists who won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, gives an interview after a press conference at Yale in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans James Rothman, 62, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY HEADSHOT)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, gives an interview after a press conference at Yale in New Haven, Connecticut on October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans James Rothman, 62, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY HEADSHOT)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, stands next to wife Joy Hirsch after a press conference at Yale in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans James Rothman, 62, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, gives a lecture to students at Yale in New Haven, Connecticut on October 7, 2013. Students encircled Rothman's podium with trophies ahead of his arrival in celebration of the award. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans James Rothman, 62, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Randy Schekman, professor of molecular and cell biology at the University of California at Berkeley, speaks on a phone after a news conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEALTH EDUCATION)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, gives a lecture to students at Yale in New Haven, Connecticut, October 7, 2013. Students encircled Rothman's podium with trophies ahead of his arrival in celebration of the award. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans James Rothman, 62, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Randy Schekman, professor of molecular and cell biology at the University of California at Berkeley, holds a parking permit for Nobel laureate given by chancellor Nicholas B. Dirks after a news conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: EDUCATION SCIENCE TECHNOLOGY HEALTH)

Randy Schekman (L), professor of molecular and cell biology at the University of California at Berkeley, holds a parking permit for Nobel laureate given by chancellor Nicholas B. Dirks after a news conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: EDUCATION SCIENCE TECHNOLOGY HEALTH)

Randy Schekman, professor of molecular and cell biology at the University of California at Berkeley, speaks during a press conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEADSHOT HEALTH EDUCATION TPX IMAGES OF THE DAY)

Randy Schekman, professor of molecular and cell biology at the University of California at Berkeley, speaks during a press conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEADSHOT HEALTH EDUCATION)

Randy Schekman, professor of molecular and cell biology at the University of California at Berkeley, gestures while speaking at a news conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: EDUCATION HEALTH SCIENCE TECHNOLOGY)

Randy Schekman, professor of molecular and cell biology at the University of California at Berkeley, speaks during a news conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: EDUCATION HEALTH SCIENCE TECHNOLOGY)

Randy Schekman (L), professor of molecular and cell biology at the University of California at Berkeley, speaks with chancellor Nicholas B. Dirks after a news conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: EDUCATION HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, gives a news conference at Yale in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, sits next to Yale University President Peter Salovey ahead of a press conference at Yale in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES- Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman (C), 62, the co-awardee of the 2013 Nobel Prize for Medicine, stands next to his wife Dr. Joy Hirsch (L) and Yale University President Peter Salovey ahead of a press conference at Yale in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: EDUCATION SCIENCE TECHNOLOGY HEALTH)

Yale University Professor James Rothman (R), 62, the co-awardee of the 2013 Nobel Prize for Medicine, smiles as he is greeted by Yale University President Peter Salovey ahead of a press conference at Yale in New Haven, Connecticut on October 7, 2013. Standing next to Rothman is his wife Dr. Joy Hirsch. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Michelle McLoughlin (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEALTH EDUCATION)

Randy Schekman (R), professor of molecular and cell biology at the University of California at Berkeley, kisses his wife Nancy Walls after a press conference in Berkeley, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Stephen Lam (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEALTH EDUCATION)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, is photographed ahead of a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Adrees Latif (UNITED STATES- Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, speaks at a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Adrees Latif (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY HEADSHOT)

Yale University Professor James Rothman (L), 62, the co-awardee of the 2013 Nobel Prize for Medicine, smiles while sitting next to Yale University President Peter Salovey ahead of a news conference at Yale in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Adrees Latif (UNITED STATES- Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman (L), 62, the co-awardee of the 2013 Nobel Prize for Medicine, is photographed as he is introduced during a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. REUTERS/Adrees Latif (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, is photographed as he is introduced during a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. REUTERS/Adrees Latif (UNITED STATES - Tags: HEADSHOT HEALTH SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, arrives to a standing ovation before attending a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Adrees Latif (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEALTH TPX IMAGES OF THE DAY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, speaks at a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Adrees Latif (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, speaks at a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. REUTERS/Adrees Latif (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, speaks at a news conference at Yale University in New Haven, Connecticut October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans Rothman, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. REUTERS/Adrees Latif (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Yale University Professor James Rothman, 62, the co-awardee of the 2013 Nobel Prize for Medicine, arrives to a standing ovation before attending a press conference at Yale University in New Haven, Connecticut, October 7, 2013. Three U.S.-based scientists won the Nobel medicine prize on Monday for plotting how vital materials such as hormones and brain chemicals are transported within cells and secreted to act on the body, giving insight into diseases such as diabetes and Alzheimer's. Americans James Rothman, 62, Randy Schekman, 64, and German-born Thomas Suedhof, 57, separately mapped out one of the body's critical networks that uses tiny bubbles known as vesicles to ferry chemicals such as insulin within cells. Medicine is the first of the Nobel prizes awarded each year. REUTERS/Adrees Latif (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY)

Randy Schekman, a professor at the University of California at Berkeley, speaks during an interview at his home in El Cerrito, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Robert Galbraith (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY PROFILE)

Randy Schekman, a professor at the University of California at Berkeley, is pictured at his home in El Cerrito, California October 7, 2013. Americans Schekman and James Rothman and Germany's Thomas Suedhof won the 2013 Nobel medicine prize for their work on how hormones are transported within and outside cells, giving insight into diseases such as diabetes and Alzheimer's. REUTERS/Robert Galbraith (UNITED STATES - Tags: SCIENCE TECHNOLOGY HEALTH PROFILE)