[1] McMaster Univ, Dept Clin Epidemiol & Biostat, Hamilton, ON, Canada
[2] Univ British Columbia, Ctr Excellence HIV AIDS, Vancouver, BC V5Z 1M9, Canada
[3] Ottawa Gen Hosp, Div Infect Dis, Ottawa, ON K1H 8L6, Canada
[4] Univ Toronto, Dept Med, Toronto, ON, Canada
[5] Canadian Coll Naturopath Med, Toronto, ON, Canada
[6] Rhodes Univ, Fac Pharm, ZA-6140 Grahamstown, South Africa