Emergency doctor Borris Adam looks at his patient after transporting him by the Die Johanniter rescue helicopter " Christoph Mittelhessen " for heart surgery at the university clinic in Giessen, Germany October 10, 2015. Rescue helicopter "Christoph Mittelhessen" is not only used for primary emergency missions after accidents or disasters but also to transfer special cases from one hospital to another across Germany due to its spacious passenger and doctor compartment and its long range. Picture taken October 10. REUTERS/Kai Pfaffenbach 

Paramedic Olaf-Perez-Preiss, emergency doctor Borris Adam and pilot Swen Silber (L-R) lift their patient from the Die Johanniter rescue helicopter " Christoph Mittelhessen " after landing on the helipad of the university clinic in Giessen, Germany October 10, 2015. Rescue helicopter "Christoph Mittelhessen" is not only used for primary emergency missions after accidents or disasters but also to transfer special cases from one hospital to another across Germany due to its spacious passenger and doctor compartment and its long range. Picture taken October 10. REUTERS/Kai Pfaffenbach 

Abuja National Hospital Chief Medical Director Jafaru Momoh speaks during a media briefing on a series of open heart operations on eight patients at the hospital in Abuja, Nigeria, August 13, 2015. Six of the operations were successfully completed with the others still ongoing. The hospital is seeking to increase awareness of Nigeria's medical capabilities. REUTERS/Afolabi Sotunde

Abuja National Hospital cardiothoracic team leader Iretiola Babaniyi speaks during a media briefing on a series of open heart operations on eight patients at the hospital in Abuja, Nigeria, August 13, 2015. Six of the operations were successfully completed with the others still ongoing. The hospital is seeking to increase awareness of Nigeria's medical capabilities. REUTERS/Afolabi Sotunde

Nonprofit organization Hospitals for Humanity Chief Executive Segun Ajayi speaks during a media briefing on a series of open heart operations on eight patients in conjunction with Abuja National Hospital, at the hospital in Abuja, Nigeria, August 13, 2015. Six of the operations were successfully completed with the others still ongoing. The hospital is seeking to increase awareness of Nigeria's medical capabilities. REUTERS/Afolabi Sotunde 

Abuja National Hospital Chief Medical Director Jafaru Momoh (L) and cardiothoracic team leader Iretiola Babaniyi take part in a media briefing on a series of open heart operations on eight patients at the hospital in Abuja, Nigeria, August 13, 2015. Six of the operations were successfully completed with the others still ongoing. The hospital is seeking to increase awareness of Nigeria's medical capabilities. REUTERS/Afolabi Sotunde

Relatives and neighbours visit 72-year old pensioner Maria Straitouri (C) who was discharged from hospital after undergoing heart surgery, in Elefsina, near Athens, May 6, 2015. The plight of 79-year-old Athenian Zina Razi and thousands like her strikes at the heart of why talks between Greece and its creditors have collapsed. She lives off a pension system that helps to consume a huge proportion of state spending and can appear overly indulgent - but still she's broke. Picture taken May 6, 2015. REUTERS/Alkis Konstantinidis 

Relatives and neighbours visit 72-year old pensioner Maria Straitouri (C) who was discharged from hospital after undergoing heart surgery, in Elefsina, near Athens, May 6, 2015. The plight of 79-year-old Athenian Zina Razi and thousands like her strikes at the heart of why talks between Greece and its creditors have collapsed. She lives off a pension system that helps to consume a huge proportion of state spending and can appear overly indulgent - but still she's broke. Picture taken May 6, 2015. REUTERS/Alkis Konstantinidis 

Italy's ambassador to India Lorenzo Angeloni (L) leaves the Supreme Court after a hearing in New Delhi April 9, 2015. India's top court said on Thursday one of the Italian marines facing murder charges can remain in his home country for a further three months, delaying the start of a trial that caused a diplomatic rift between New Delhi and the European Union. The Supreme Court granted permission for Massimiliano Latorre to remain in Italy until July 15, so that he can continue his recovery from a heart surgery he underwent in January. He left for Italy ahead of the surgery last September. REUTERS/Adnan Abidi

Relatives gather near the casket of Canek Sanchez Guevara, the grandson of Cuban revolutionary leader Che Guevara, during his wake in Mexico City, January 21, 2015. Canek, 40, died on Wednesday after heart surgery, according to local media. REUTERS/Edgard Garrido (MEXICO - Tags: POLITICS OBITUARY) 

A photo of Canek Sanchez Guevara, the grandson of Cuban revolutionary leader Che Guevara, hangs above his casket during his wake in Mexico City, January 21, 2015. Canek, 40, died on Wednesday after heart surgery, according to local media. REUTERS/Edgard Garrido (MEXICO - Tags: POLITICS OBITUARY) 

Mourners gather near the casket of Canek Sanchez Guevara, the grandson of Cuban revolutionary leader Che Guevara, during his wake in Mexico City, January 21, 2015. Canek, 40, died on Wednesday after heart surgery, according to local media. REUTERS/Edgard Garrido (MEXICO - Tags: POLITICS OBITUARY) 

A photo of Canek Sanchez Guevara, the grandson of Cuban revolutionary leader Che Guevara, hangs above his casket during his wake in Mexico City, January 21, 2015. Canek, 40, died on Wednesday after heart surgery, according to local media. REUTERS/Edgard Garrido (MEXICO - Tags: POLITICS OBITUARY) 

Mourners hug near the casket of Canek Sanchez Guevara, the grandson of Cuban revolutionary leader Che Guevara, during his wake in Mexico City, January 21, 2015. Canek, 40, died on Wednesday after heart surgery, according to local media. REUTERS/Edgard Garrido (MEXICO - Tags: POLITICS OBITUARY) 

President of the Argentine Football of Association and Vice President of FIFA Julio Grondona is seen in Buenos Aires May 13, 2014. Grondona, aged 82, died July 30, 2014, at a medical centre in Buenos Aires as he was about to undergo heart surgery. Grondona, who has been head of the Argentina FA since 1979, was in charge when Maradona almost single-handedly steered Argentina to World Cup victory in Mexico in 1986. He was also present for the swearing-in ceremony when Maradona became coach of the national team leading up to the South Africa World Cup in 2010. Picture taken May 13, 2014. REUTERS/Enrique Marcarian (ARGENTINA - Tags: OBITUARY SPORT SOCCER) 

Syria's Deputy Foreign Minister Faisal Mekdad leaves the American University of Beirut Medical Center after visiting Syrian Foreign Minister Walid al-Moualem in Beirut March 18, 2014. Syrian Foreign Minister Walid al-Moualem underwent heart surgery on March 14 at a hospital in Lebanon, Syrian state media said.
REUTERS/Hasan Shaaban (LEBANON - Tags: POLITICS HEALTH) 

Syria's Deputy Foreign Minister Faisal Mekdad (3rd L) leaves the American University of Beirut Medical Center after visiting Syrian Foreign Minister Walid al-Moualem in Beirut March 18, 2014. Syrian Foreign Minister Walid al-Moualem underwent heart surgery on March 14 at a hospital in Lebanon, Syrian state media said. REUTERS/Hasan Shaaban (LEBANON - Tags: POLITICS HEALTH) 

Denver Broncos head coach John Fox pats his heart area as he talks with running back Knowshon Moreno (27) during their practice session for the Super Bowl at the New York Jets Training Center in Florham Park, New Jersey January 31, 2014. Fox underwent heart surgery during the season. REUTERS/Ray Stubblebine (UNITED STATES - Tags: SPORT FOOTBALL) 

Denver Broncos head coach John Fox pats his heart area as he talks with players as quarterback Peyton Manning (18) does stretching during their practice session for the Super Bowl at the New York Jets Training Center in Florham Park, New Jersey, January 31, 2014. Fox underwent heart surgery during the season. REUTERS/Ray Stubblebine (UNITED STATES - Tags: SPORT FOOTBALL) 

Chairman of Carmat Jean-Claude Cadudal (L), Professor Christian Latremouille (C) of the department of cardiovascular surgery and transplant of organs at the Georges Pompidou European Hospital and French Social Affairs and Health Minister Marisol Touraine attend a news conference at the Georges Pompidou European Hospital in Paris, December 21, 2013. France's Carmat said on Friday it had carried out its first implant of an artificial heart that can beat for up to five years, adding that the operation had gone smoothly. The implant operation was performed on Wednesday, the biomedical firm said in a statement. REUTERS/Benoit Tessier (FRANCE - Tags: SCIENCE TECHNOLOGY HEALTH) 

Chairman of Carmat Jean-Claude Cadudal (L) and Professor Christian Latremouille of the department of cardiovascular surgery and transplant of organs at the Georges Pompidou European Hospital attend a news conference at the Georges Pompidou European Hospital in Paris, December 21, 2013. France's Carmat said on Friday it had carried out its first implant of an artificial heart that can beat for up to five years, adding that the operation had gone smoothly. The implant operation was performed on Wednesday, the biomedical firm said in a statement. REUTERS/Benoit Tessier (FRANCE - Tags: SCIENCE TECHNOLOGY HEALTH) 

Chairman of Carmat Jean-Claude Cadudal (L) and Professor Christian Latremouille of the department of cardiovascular surgery and transplant of organs at the Georges Pompidou European Hospital attend a news conference at the Georges Pompidou European Hospital in Paris, December 21, 2013. France's Carmat said on Friday it had carried out its first implant of an artificial heart that can beat for up to five years, adding that the operation had gone smoothly. The implant operation was performed on Wednesday, the biomedical firm said in a statement. REUTERS/Benoit Tessier (FRANCE - Tags: SCIENCE TECHNOLOGY HEALTH) 

Professor Christian Latremouille (L), member of the department of cardiovascular surgery and transplantation of organs at Georges Pompidou European Hospital, French Social Affairs and Health Minister Marisol Touraine (C) and Alain Carpentier, surgeon and Carmat co-founder attend a news conference at the Georges Pompidou European Hospital in Paris, December 21, 2013. France's Carmat said on Friday it had carried out its first implant of an artificial heart that can beat for up to five years, adding that the operation had gone smoothly. The implant operation was performed on Wednesday, the biomedical firm said in a statement. REUTERS/Benoit Tessier (FRANCE - Tags: SCIENCE TECHNOLOGY HEALTH) 

Raquel Del Carmen, who is seven-months-old, lies on her bed at the William Soler Children's Heart Center as she waits for surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. Cuba held the news conference, where it announced the draft U.N. resolution calling for an end to the embargo, at the William Soler children's heart center to emphasize that the sanctions do not discriminate between the country's political leadership and innocent people and amounts to what it calls "genocide." The hospital's director, Eugenio Selman-Housein Sosa, said his center often lacked the most modern equipment and medicines because U.S. companies predominated in some sectors and Washington's regulations on checking end-users made business next to impossible. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Marilina Barcesia, who is four-month's-old, rests in the arms of her mother at the William Soler Children's Heart Center as she waits for surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. Cuba held the news conference, where it announced the draft U.N. resolution calling for an end to the embargo, at the William Soler children's heart center to emphasize that the sanctions do not discriminate between the country's political leadership and innocent people and amounts to what it calls "genocide." The hospital's director, Eugenio Selman-Housein Sosa, said his center often lacked the most modern equipment and medicines because U.S. companies predominated in some sectors and Washington's regulations on checking end-users made business next to impossible. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Marcelo Echevarria, 6, receives tuition at the William Soler Children's Heart Center as he waits for surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. Cuba held the news conference, where it announced the draft U.N. resolution calling for an end to the embargo, at the William Soler children's heart center to emphasize that the sanctions do not discriminate between the country's political leadership and innocent people and amounts to what it calls "genocide." The hospital's director, Eugenio Selman-Housein Sosa, said his center often lacked the most modern equipment and medicines because U.S. companies predominated in some sectors and Washington's regulations on checking end-users made business next to impossible. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Nayara Perez Estevez, 5, sits on her bed at the William Soler Children's Heart Center as she waits for her fourth surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. Cuba held the news conference, where it announced the draft U.N. resolution calling for an end to the embargo, at the William Soler children's heart center to emphasize that the sanctions do not discriminate between the country's political leadership and innocent people and amounts to what it calls "genocide." The hospital's director, Eugenio Selman-Housein Sosa, said his center often lacked the most modern equipment and medicines because U.S. companies predominated in some sectors and Washington's regulations on checking end-users made business next to impossible. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Javier Aleman Cervantes, 21, lies in bed at the William Soler Children's Heart Center after surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. Cuba held the news conference, where it announced the draft U.N. resolution calling for an end to the embargo, at the William Soler children's heart center to emphasize that the sanctions do not discriminate between the country's political leadership and innocent people and amounts to what it calls "genocide." The hospital's director, Eugenio Selman-Housein Sosa, said his center often lacked the most modern equipment and medicines because U.S. companies predominated in some sectors and Washington's regulations on checking end-users made business next to impossible. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Eduardo Fabio Rivero, 1, lies in bed beside his mother at the William Soler Children's Heart Center after surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. Cuba held the news conference, where it announced the draft U.N. resolution calling for an end to the embargo, at the William Soler children's heart centre to emphasize that the sanctions do not discriminate between the country's political leadership and innocent people and amounts to what it calls "genocide." Cuba held the news conference, where it announced the draft U.N. resolution calling for an end to the embargo, at the William Soler children's heart centre to emphasize that the sanctions do not discriminate between the country's political leadership and innocent people and amounts to what it calls "genocide." REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Javier Aleman Cervantes, 21, lies in bed at the William Soler Children's Heart Center after surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. U.S. President Barack Obama, who stated before taking office that he wanted to recast long-hostile U.S.-Cuba relations, has been a disappointment to the Cuban government, which expected him to do more to dismantle the embargo. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Eduardo Fabio Rivero, 1, lies in bed at the William Soler Children's Heart Center after surgery in Havana October 7, 2013. For the 22nd consecutive year, Cuba will ask the United Nations to condemn the United States economic embargo against the island, a top Cuban official announced on Monday, accusing Washington of tightening sanctions in place for more than half a century. U.S. President Barack Obama, who stated before taking office that he wanted to recast long-hostile U.S.-Cuba relations, has been a disappointment to the Cuban government, which expected him to do more to dismantle the embargo. REUTERS/Desmond Boylan (CUBA - Tags: POLITICS HEALTH BUSINESS) 

Father of twenty-one-day old Emily, Frank Espinoza, takes a picture of Emily inside of an incubator as her mother Jenny Choque looks on, after Emily was born conjoined with a female twin at San Bartolome hospital in Lima July 11, 2013. According to the hospital, the twins were joined by the liver and were separated 3 days after their birth in an eight-hour surgery due to an extremely complicated congenital heart disease of Emily's sister, that put Emily on serious risk. Emily's sister, who is unnamed, died but Emily is currently in stable condition and with favorable prognosis, the hospital added. REUTERS/Enrique Castro-Mendivil (PERU - Tags: HEALTH) 

Twenty-one-day old Emily's parents Frank Espinoza and Jenny Choque, look at Emily, who is inside of an incubator after being born conjoined with a female twin, at San Bartolome hospital in Lima, July 11, 2013. According to the hospital, the twins were joined by the liver and were separated 3 days after their birth in an eight-hour surgery due to an extremely complicated congenital heart disease of Emily's sister, that put Emily on serious risk. Emily's sister, who is unnamed, died but Emily is currently in stable condition and with favorable prognosis, the hospital added. REUTERS/Enrique Castro-Mendivil (PERU - Tags: HEALTH) 

Twenty-one-day old Emily is seen inside of an incubator after being born conjoined with a female twin at San Bartolome hospital in Lima July 11, 2013. According to the hospital, the twins were joined by the liver and were separated 3 days after their birth in an eight-hour surgery due to an extremely complicated congenital heart disease of Emily's sister, that put Emily on serious risk. Emily's sister, who is unnamed, died but Emily is currently in stable condition and with favorable prognosis, the hospital added. REUTERS/Enrique Castro-Mendivil (PERU - Tags: HEALTH) 

Japanese mountain climber Yuichiro Miura, 80, shows a victory sign upon his arrival at the airport after climbing Mount Everest, in Kathmandu May 26, 2013. Miura, who has had four heart surgeries, reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world's highest mountain. Miura, who first climbed Everest in 2003 and repeated the feat five years later, takes the oldest climber record from Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76 in 2008. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY TRAVEL) 

The sunburnt face of Japanese mountain climber Yuichiro Miura, 80, is pictured upon his arrival at the airport after climbing Mount Everest, in Kathmandu May 26, 2013. Miura, who has had four heart surgeries, reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world's highest mountain. Miura, who first climbed Everest in 2003 and repeated the feat five years later, takes the oldest climber record from Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76 in 2008. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY TRAVEL HEADSHOT) 

Japanese mountain climber Yuichiro Miura, 80, shows a victory sign upon his arrival at the airport after climbing Mount Everest, in Kathmandu May 26, 2013. Miura, who has had four heart surgeries, reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world's highest mountain. Miura, who first climbed Everest in 2003 and repeated the feat five years later, takes the oldest climber record from Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76 in 2008. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY TRAVEL) 

Japanese climber Yuichiro Miura, 80, shows a victory sign upon his arrival at the airport after climbing Mount Everest, in Kathmandu May 26, 2013. Miura, who has had four heart surgeries, reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world's highest mountain. Miura, who first climbed Everest in 2003 and repeated the feat five years later, takes the oldest climber record from Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76 in 2008. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY TRAVEL) 

Japanese mountain climber Yuichiro Miura, 80, walks out from a vehicle upon his arrival at the airport after climbing Mount Everest, in Kathmandu May 26, 2013. Miura, who has had four heart surgeries, reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world's highest mountain. Miura, who first climbed Everest in 2003 and repeated the feat five years later, takes the oldest climber record from Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76 in 2008. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY TRAVEL) 

Japanese mountain climber Yuichiro Miura, 80, shows the victory sign upon his arrival at the airport after climbing Mount Everest, in Kathmandu May 26, 2013. Miura, who has had four heart surgeries, reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world's highest mountain. Miura, who first climbed Everest in 2003 and repeated the feat five years later, takes the oldest climber record from Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76 in 2008. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY TRAVEL TPX IMAGES OF THE DAY) 

Jose Maria Marin (R), president of the Brazilian Football Confederation (CBF) speaks with Marco Polo Del Nero, vice president of the CBF during a news conference in Asuncion April 23, 2013. Nicolas Leoz, president of South American soccer body Conmebol, announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz (2nd R), president of South American soccer body Conmebol, speaks alongside Jose Maria Marin (2nd L), president of the Brazilian Football Confederation (CBF), Marco Polo Del Nero (L), vice president of the CBF, and Juan Angel Napout, president of the Paraguayan Football Association during a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz (R), president of South American soccer body Conmebol, Jose Maria Marin (C), president of the Brazilian Football Confederation (CBF) and Marco Polo Del Nero, vice president of the CBF, arrive at a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz (R), president of South American soccer body Conmebol, arrives at a news conference with Jose Maria Marin, president of the Brazilian Football Confederation (CBF), in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz, president of South American soccer body Conmebol, speaks during a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz, president of South American soccer body Conmebol, speaks during a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz, president of South American soccer body Conmebol, speaks during a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz, president of South American soccer body Conmebol, attends a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz, president of South American soccer body Conmebol, speaks during a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Jose Maria Marin, president of the Brazilian Football Confederation (CBF), attends a news conference with Nicolas Leoz (not pictured), president of South American soccer body Conmebol, in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz (R), president of South American soccer body Conmebol, speaks alongside Jose Maria Marin, president of the Brazilian Football Confederation (CBF), during a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Nicolas Leoz, president of South American soccer body Conmebol, speaks during a news conference in Asuncion April 23, 2013. Leoz announced his resignation from FIFA's executive committee for health reasons on Tuesday. The 84-year-old Paraguayan, who had heart surgery for the fourth time in December, has led Conmebol since 1986 and been on the executive committee of world body FIFA since 1998. REUTERS/Jorge Adorno (PARAGUAY - Tags: SPORT SOCCER) 

Japanese climber Yuichiro Miura, 80, gestures as he speaks during an interview with Reuters in Kathmandu March 30, 2013. Miura, who has had heart surgery four times is heading to Mount Everest to try for a third ascent of the world's highest peak, having climbed to the summit in 2003 and 2008. He will become the oldest person to reach the top if he succeeds, breaking the record for the oldest person to climb the mountain, currently held by Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76, in 2008. Picture taken March 30, 2013. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY SPORT PROFILE) 

Japanese climber Yuichiro Miura, 80, explains his trekking route to a journalist during an interview with Reuters in Kathmandu March 30, 2013. Miura, who has had heart surgery four times is heading to Mount Everest to try for a third ascent of the world's highest peak, having climbed to the summit in 2003 and 2008. He will become the oldest person to reach the top if he succeeds, breaking the record for the oldest person to climb the mountain, currently held by Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76, in 2008. Picture taken March 30, 2013. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY SPORT) 

Japanese mountain climber Yuichiro Miura, 80, speaks during an interview with Reuters in Kathmandu March 30, 2013. Miura, who has had heart surgery four times is heading to Mount Everest to try for a third ascent of the world's highest peak, having climbed to the summit in 2003 and 2008. He will become the oldest person to reach the top if he succeeds, breaking the record for the oldest person to climb the mountain, currently held by Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76, in 2008. Picture taken March 30, 2013. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY SPORT PROFILE) 

Yuta Miura (R) hands a family picture to his father, Japanese mountain climber Yuichiro Miura, while packing their luggage at their hotel room in Kathmandu March 30, 2013. Yuichiro, 80, who has had heart surgery four times is heading to Mount Everest to try for a third ascent of the world's highest peak, having climbed to the summit in 2003 and 2008. He will become the oldest person to reach the top if he succeeds, breaking the record for the oldest person to climb the mountain, currently held by Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76, in 2008. Picture taken March 30, 2013. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY SPORT) 

Japanese alpinist Yuichiro Miura, 80, speaks during an interview with Reuters in Kathmandu March 30, 2013. Miura, who has had heart surgery four times is heading to Mount Everest to try for a third ascent of the world's highest peak, having climbed to the summit in 2003 and 2008. He will become the oldest person to reach the top if he succeeds, breaking the record for the oldest person to climb the mountain, currently held by Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76, in 2008. Picture taken March 30, 2013. REUTERS/Navesh Chitrakar (NEPAL - Tags: SOCIETY SPORT PROFILE) 

A woman stands in a restaurant between posters of Venezuela's President Hugo Chavez, in front of a military hospital, where Chavez is being treated, in Caracas February 20, 2013. Chavez made a surprise return to Venezuela on Monday, more than two months after cancer surgery in Cuba, to continue treatment at home for the disease that is jeopardizing his 14-year socialist rule. The poster reads, "The hearts of the people are lifted. Vote for Chavez." REUTERS/Carlos Garcia Rawlins (VENEZUELA - Tags: POLITICS ELECTIONS HEALTH FOOD)