Dr. Edjah Nduom, Associate Professor of Neurosurgery at Emory University School of Medicine, speaks, as U.S. President Joe Biden and First Lady Jill Biden sit on stage, at an event to reignite the 'Cancer Moonshot' initiative with a goal to reduce cancer death by 50 percent over the next 25 years, in the East Room at the White House in Washington, D.C., U.S., February 2, 2022. REUTERS/Cheriss May 

Dr. Edjah Nduom, Associate Professor of Neurosurgery at Emory University School of Medicine, speaks at an event to reignite the 'Cancer Moonshot' initiative with a goal to reduce cancer death by 50 percent over the next 25 years, in the East Room at the White House in Washington, D.C., U.S., February 2, 2022. REUTERS/Cheriss May 

Dr. Edjah Nduom, Associate Professor of Neurosurgery at Emory University School of Medicine, speaks at an event to reignite the 'Cancer Moonshot' initiative with a goal to reduce cancer death by 50 percent over the next 25 years, in the East Room at the White House in Washington, D.C., U.S., February 2, 2022. REUTERS/Cheriss May 

Nurses Rita and Mary pose in front of balloons outside the National Hospital for Neurology and Neurosurgery, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain, April 25, 2020. REUTERS/Simon Dawson 

A muslim woman walks past balloons outside the National Hospital for Neurology and Neurosurgery, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain, April 25, 2020. REUTERS/Simon Dawson TPX IMAGES OF THE DAY 

Doctors perform neurosurgery in Los Angeles, California, U.S. on May 26, 2016. REUTERS/Lucy Nicholson 

Doctors perform neurosurgery in Los Angeles, California, U.S. on May 26, 2016. REUTERS/Lucy Nicholson 

Doctors perform neurosurgery in Los Angeles, California, U.S. on May 26, 2016. REUTERS/Lucy Nicholson 

John R. Ruge, MD, pediatric neurosurgery speaks during a news conference where doctors and staff discuss the outcome of a complex surgical procedure to treat 10-month old "Baby Dominique", who was born with four legs and two spines, at Advocate Children's Hospital in Park Ridge, Illinois, U.S., March 21, 2017. REUTERS/John Gress 

U.S. President Donald Trump and Ben Carson (C), his nominee to lead the Department of Housing and Urban Development (HUD), joined by Carson's wife, Candy Carson, look at the exhibit dedicated to Carson's distinguished career as a neurosurgeon during a visit to the National Museum of African American History and Culture on the National Mall in Washington, U.S., February 21, 2017. REUTERS/Jonathan Ernst 

U.S. President Donald Trump and Ben Carson (C), his nominee to lead the Department of Housing and Urban Development (HUD), look at the exhibit dedicated to Carson's distinguished career as a neurosurgeon during a visit to the National Museum of African American History and Culture on the National Mall in Washington, U.S., February 21, 2017. REUTERS/Jonathan Ernst 

U.S. President Donald Trump (R) and Ben Carson (2nd R), his nominee to lead the Department of Housing and Urban Development (HUD), look at the exhibit dedicated to Carson's distinguished career as a neurosurgeon during a visit to the National Museum of African American History and Culture on the National Mall in Washington, U.S., February 21, 2017. REUTERS/Jonathan Ernst 

Neurosurgery, welding, venture capitalism, construction, film directing and the electrical trade - these are six jobs where U.S. women have made inroads but are still vastly outnumbered by men. And one position, U.S. president, has never been filled by a woman. With presumptive Democratic nominee Hillary Clinton seeking to become the first to break that barrier, several women in career fields made up mostly of men told Reuters that they saw her candidacy as significant. REUTERS/Lucy Nicholson SEARCH "WOMEN WORKERS" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES TPX IMAGES OF THE DAY 

Journalists surround a table where (L-R) neurosurgeon Stephan Chabardes, Jean-Francois Payen, head anaesthetician at the CHU hospital, Jacqueline Hubert, director general of the hospital, Emmanuel Gay, head of neurosurgery, and Professor Gerard Saillant, President of the Institute for Brain and Spinal Cord Disorders (ICM), attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: HEALTH SPORT MEDIA MOTORSPORT) 

Journalists surround a table where neurosurgeon Stephan Chabardes (R), Jean-Francois Payen (2ndR), head anaesthetician at the CHU hospital, Jacqueline Hubert (3rdR), director general of the hospital, and Emmanuel Gay (4thR), head of neurosurgery, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Charles Platiau (FRANCE - Tags: HEALTH SPORT MEDIA MOTORSPORT) 

Jean-Francois Payen (L), head anaesthetician at the CHU hospital, and Emmanuel Gay (R), head of neurosurgery unit, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: SPORT MOTORSPORT HEALTH) 

Jean-Francois Payen (L), head anaesthetician at the CHU hospital, and Emmanuel Gay (R), head of neurosurgery unit, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: SPORT MOTORSPORT HEALTH) 

Emmanuel Gay, head of neurosurgery unit, attends a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: HEALTH SPORT MOTORSPORT HEADSHOT) 

Jean-Francois Payen (L), head anaesthetician at the CHU hospital, and Emmanuel Gay (R), head of neurosurgery unit, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Charles Platiau (FRANCE - Tags: SPORT MOTORSPORT HEALTH) 

Journalists surround a table where neurosurgeon Stephan Chabardes (R), Jean-Francois Payen (2ndR), head anaesthetician at the CHU hospital, Jacqueline Hubert (3rdR), director general of the hospital, and Emmanuel Gay (4thR), head of neurosurgery, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Charles Platiau (FRANCE - Tags: HEALTH SPORT MEDIA MOTORSPORT TPX IMAGES OF THE DAY) 

Emmanuel Gay, head of neurosurgery unit, attends a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: HEALTH SPORT MOTORSPORT HEADSHOT) 

(L-R) Neurosurgeon Stephan Chabardes, Jean-Francois Payen, head anaesthetician at the CHU hospital, Emmanuel Gay, head of neurosurgery, and Professor Gerard Saillant, President of the Institute for Brain and Spinal Cord Disorders (ICM), attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: HEALTH SPORT MOTORSPORT) 

(L-R) Neurosurgeon Stephan Chabardes, Jean-Francois Payen, head anaesthetician at the CHU hospital, Jacqueline Hubert, director general of the hospital, and Emmanuel Gay, head of neurosurgery, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Charles Platiau (FRANCE - Tags: HEALTH SPORT MEDIA MOTORSPORT) 

(L-R) Neurosurgeon Stephan Chabardes, Jean-Francois Payen, head anaesthetician at the CHU hospital, Professor Gerard Saillant, President of the Institute for Brain and Spinal Cord Disorders (ICM), and Emmanuel Gay, head of neurosurgery, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: HEALTH SPORT MOTORSPORT) 

(L-R) Neurosurgeon Stephan Chabardes, Jean-Francois Payen, head anaesthetician at the CHU hospital, Jacqueline Hubert, director general of the hospital, and Emmanuel Gay, head of neurosurgery, attend a news conference at the CHU hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 31, 2013. The medical condition of seven-times Formula One world champion Michael Schumacher is slightly better on Tuesday following a second operation during the night to treat head injuries he sustained in a skiing accident, doctors said. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Charles Platiau (FRANCE - Tags: HEALTH SPORT MEDIA MOTORSPORT) 

(R rear to R front) Neurosurgeon Stephan Chabardes, Jean-Francois Payen, head anaesthetician at the CHU hospital, Marc Penaud, hospital deputy general director, and Emmanuel Gay, head of neurosurgery, attend a news conference at the CHU Nord hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 30, 2013. Former Formula One champion Michael Schumacher was battling for his life in hospital on Monday after a ski injury, doctors said, adding it was too early to say whether he would pull through. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: SPORT MOTORSPORT HEALTH MEDIA) 

(L-R) Jean-Francois Payen, head anaesthetician at the CHU hospital, neurosurgeon Stephan Chabardes, Marc Penaud, hospital deputy general director, and Emmanuel Gay, head of neurosurgery, attend a news conference at the CHU Nord hospital emergency unit in Grenoble, French Alps, where retired seven-times Formula One world champion Michael Schumacher is hospitalized after a ski accident, December 30, 2013. Former Formula One champion Michael Schumacher was battling for his life in hospital on Monday after a ski injury, doctors said, adding it was too early to say whether he would pull through. Schumacher was admitted to hospital on Sunday suffering head injuries in an off-piste skiing accident in the French Alps resort of Meribel. REUTERS/Robert Pratta (FRANCE - Tags: SPORT MOTORSPORT HEALTH) 

Eric Metaxas (C) moderates a chat with Dr. Benjamin Carson (R), director of Pediatric Neurosurgery at Johns Hopkins School of Medicine, during the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, March 16, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS) 

Members of the audience cheer for Dr. Benjamin Carson (on video screen), director of Pediatric Neurosurgery at Johns Hopkins School of Medicine, as he asks them to imagine him in the White House, during remarks to the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, March 16, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS) 

Dr. Benjamin Carson, director of Pediatric Neurosurgery at Johns Hopkins School of Medicine, delivers remarks to the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, March 16, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH) 

Dr. Benjamin Carson, director of Pediatric Neurosurgery at Johns Hopkins School of Medicine, pauses during remarks to the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, March 16, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH) 

Dr. Benjamin Carson, director of Pediatric Neurosurgery at Johns Hopkins School of Medicine, delivers remarks to the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, March 16, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH) 

Dr. Benjamin Carson, director of Pediatric Neurosurgery at Johns Hopkins School of Medicine, speaks to the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, March 16, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH) 

Dr. Benjamin Carson, director of Pediatric Neurosurgery at Johns Hopkins School of Medicine, takes the stage to speak to the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, March 16, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH) 

A neurosurgeon talks with a patient undergoing a brain surgery at the National Neurology Institute in Budapest December 15, 2012. The complex operation, called deep brain stimulation (DBS) and involves stimulation of certain areas of the human brain with high-frequency electricity, is carried out with the patient awake and communicating with the doctors during certain phases of the operation. REUTERS/Bernadett Szabo (HUNGARY - Tags: HEALTH SCIENCE TECHNOLOGY) 

A woman lies on an operating table during a brain surgery at the National Neurology Institute in Budapest December 15, 2012. The complex operation, called deep brain stimulation (DBS) and involves stimulation of certain areas of the human brain with high-frequency electricity, is carried out with the patient awake and communicating with the doctors during certain phases of the operation. REUTERS/Bernadett Szabo (HUNGARY - Tags: HEALTH) 

Britain's Prime Minister David Cameron (L) looks at a brain scan as he stands with professor Nick Fox at the National Hospital for Neurology and Neurosurgery in London March 26, 2012. Cameron announced on Monday that funding for research into dementia would be doubled to 66 million pounds by 2015. REUTERS/Mark Richards/pool (BRITAIN - Tags: POLITICS HEALTH SOCIETY) 

Britain's Prime Minister David Cameron (L) speaks with professors Nick Fox and Martin Rossor as he stands next to a Magnetic resonance imaging (MRI) machine at the National Hospital for Neurology and Neurosurgery in London March 26, 2012. Cameron announced on Monday that funding for research into dementia would be doubled to 66 million pounds by 2015. REUTERS/Mark Richards/pool (BRITAIN - Tags: POLITICS HEALTH SOCIETY) 

German premier of the state of Thuringia Dieter Althaus answers journalists questions after his release at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

German premier of the state of Thuringia Dieter Althaus answers journalists questions after his release at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

German premier of the state of Thuringia Dieter Althaus is pictured as he leaves at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

German premier of the state of Thuringia Dieter Althaus is pictured as he leaves at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

German premier of the state of Thuringia Dieter Althaus is pictured with his wife Katharina as he leaves at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

German premier of the state of Thuringia Dieter Althaus answers journalists questions after his release at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

German premier of the state of Thuringia Dieter Althaus is pictured as he leaves at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

German premier of the state of Thuringia Dieter Althaus is pictured as he leaves at the hospital of neurosurgery in Allensbach, March 18, 2009. Althaus fractured his skull in a collision on a ski slope in Austria on New Year's Day, after which a Slovakian woman died. REUTERS/Miro Kuzmanovic (GERMANY POLITICS HEALTH) 

Klaus Hoeffken (L-R), medical director at the university hospital in Jena, Rolf Kalff, director at the hospital of neurosurgery, and financial director Rudolf Kruse attend a news conference on the state of health of Dieter Althaus in Jena, January 12, 2009. Althaus, German premier of the state of Thuringia, was transferred to Jena last week following a serious skiing accident in Austria on January 1, in which one woman died. REUTERS/Tobias Schwarz (GERMANY) 

Rolf Kalff (R), director at the hospital of neurosurgery in Jena, talks to medical director Klaus Hoeffken after a news conference on the state of health of Dieter Althaus in Jena, January 12, 2009. Althaus, German premier of the state of Thuringia, was transferred to Jena last week following a serious skiing accident in Austria on January 1, in which one woman died. REUTERS/Tobias Schwarz (GERMANY) 

Rolf Kalff, director at the hospital of neurosurgery in Jena, addresses a news conference on the state of health of Dieter Althaus in Jena, January 12, 2009. Althaus, German premier of the state of Thuringia, was transferred to Jena last week following a serious skiing accident in Austria on January 1, in which one woman died. REUTERS/Tobias Schwarz (GERMANY) 

Sister Melissa Strickland comforts 19-month-old Harley Frakes on the Parrot 'neurosurgery' Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system, celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

Nurse Una Frederick comforts seven-month-old Clayton Bailey on the Parrot "neurosurgery" Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system, celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

Sister Melissa Strickland comforts 19-month-old Harley Frakes on the Parrot 'neurosurgery' Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system, celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

A patients poem is stuck on a notice board on the Parrot "neurosurgery" Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system, celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

Nurses chat on the Parrot "neurosurgery" Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system, celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

Sister Melissa Strickland comforts 19-month-old Harley Frakes on the Parrot "neurosurgery" Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system, celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

A nurse chats with parents on the Parrot "neurosurgery" Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system, celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

Nurse Una Frederick comforts seven-month-old Clayton Bailey on the Parrot "neurosurgery" Ward at Great Ormond Street Hospital for Children and NHS Trust in central London July 4, 2008. Britain's National Health Service launched on July 5, 1948 by then Labour Health Minister Aneurin Bevan as a cradle-to-grave system celebrates its 60th anniversary on Saturday. REUTERS/Dylan Martinez (BRITAIN) 

An Innovative Magnetic Resonance Imaging System, or MRI unit, is seen at the Calgary Foothills hospital in Calgary, Alberta April 17, 2007. REUTERS/Todd Korol (CANADA) 

The new neurosurgery robot arm at the University of Calgary faculty of medicine demonstrates how it will do brain surgery in Calgary, Alberta April 17, 2007. REUTERS/Todd Korol (CANADA) 

Dr. Garnette Sutherland, a neurosurgeon at the University of Calgary faculty of medicine, demonstrates how a new robot arm will do brain surgery in Calgary, Alberta April 17, 2007. REUTERS/Todd Korol (CANADA)