[1] Univ Ottawa, Fac Med, Ottawa, ON, Canada
[2] Member IOC Med Commiss Games Med Grp, Rio De Janeiro, Brazil
[3] BMJ Grp, BMJ Learning, London, England
[4] United Kingdom Antidoping Org, London, England
[5] Int Olymp Comm, Lausanne, Switzerland
[6] Univ Ottawa, Div Prevent & Rehabil, Heart Inst, 40 Ruskin St, Ottawa, ON K1Y 4W7, Canada