 In March 2014 Team Sky announced that they would remove Henao from the team's race schedule for eight weeks after they raised questions about the results of out-of-competition tests Henao undertook after he returned to Rionegro in October 2013 for the winter.Team Sky principal Dave Brailsford noted that the team's ability to interpret Henao's results was hampered by a lack of research into the physiology of "altitude natives" who grew up in high-altitude environments and that the team would commission independent research to shed light on the situation.Subsequently, in June 2014 the team announced that the research programme, conducted by researchers at the University of Sheffield with the cooperation of Colombian anti-doping agency, had been completed, the findings had been sent to WADA, the UCI and the Colombian Anti-Doping Federation, and that Henao would return to competition at the 2014 Tour de Suisse.