REFILE - CORRECTING TYPOPhilanthropist Bill Gates (R) embraces Priscilla Chan (2nd R) as Mark Zuckerberg looks on during an announcement of the Chan Zuckerberg Initiative to "cure, prevent or manage all disease" by the end of the century during a news conference at UCSF Mission Bay in San Francisco, California, U.S. September 21, 2016. REUTERS/Beck Diefenbach

REFILE - CORRECTING TYPOPriscilla Chan (R) embraces her husband Mark Zuckerberg while announcing the Chan Zuckerberg Initiative to "cure, prevent or manage all disease" by the end of the century during a news conference at UCSF Mission Bay in San Francisco, California, U.S. September 21, 2016. REUTERS/Beck Diefenbach TPX IMAGES OF THE DAY

REFILE - CORRECTING TYPOPriscilla Chan (R) and her husband Mark Zuckerberg announce the Chan Zuckerberg Initiative to "cure, prevent or manage all disease" by the end of the century during a news conference at UCSF Mission Bay in San Francisco, California, U.S. September 21, 2016. REUTERS/Beck Diefenbach

South Korea's Kim Yuna stands in the limelight in front of a lit Korean flag during the Figure Skating Gala Exhibition at the 2014 Sochi Winter Olympics February 22, 2014. REUTERS/David Gray

South Korea's Kim Yuna performs during the Figure Skating Gala Exhibition at the 2014 Sochi Winter Olympics February 22, 2014. REUTERS/David Gray

South Korea's Kim Yuna performs during the Figure Skating Gala Exhibition at the 2014 Sochi Winter Olympics February 22, 2014. REUTERS/David Gray

The royal palace is pictured in Bangkok, Thailand, August 31, 2016. Picture taken August 31, 2016. REUTERS/Jorge Silva

Tourists hold up umbrellas at a department store in Bangkok, Thailand, September 21, 2016. Picture taken September 21, 2016. REUTERS/Athit Perawongmetha