FILE - United States' Aries Merritt, center, France's Dimitri Bascou, left, and France's Garfield Darien compete in the men's 110m hurdles final at the World Athletics Championships at the Bird's Nest stadium in Beijing, Aug. 18, 2015. Top hurdlers reach out to world-record holder Aries Merritt to ask for his input all the time. So do those going through transplants. Merritt had a kidney transplant in 2015, just days after winning a bronze medal at the Beijing world championships. (AP Photo/David J. Phillip, File)
FILE - United States' gold medal winner Aries Merritt shows off his medal during the ceremony for the men's 110-meter hurdles at the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. Top hurdlers reach out to world-record holder Aries Merritt to ask for his input all the time. So do those going through transplants. Merritt had a kidney transplant in 2015, just days after winning a bronze medal at the Beijing world championships. (AP Photo/Matt Slocum, File)