In 2006, the subject was revisited more thoroughly by the World Anti-Doping Agency (WADA) which claimed that it could be equivalent to blood doping and therefore they should be banned; however, on September 16, 2006, Dick Pound of the WADA announced that "... the overwhelming consensus of our health, medicine and research committees – was that, at this time, it is not appropriate to do so." No explanation was given as to how WADA could possibly have enforced such a ban.