[1] Hosp Sick Children, Div Resp Med, Toronto, ON M5G 1X8, Canada
[2] Univ Saskatchewan, Div Respirol Crit Care & Sleep Med, Saskatoon, SK, Canada
[3] Univ Western Ontario, Dept Med, Div Respirol, London, ON, Canada
[4] Dalhousie Univ, Div Respirol, Halifax, NS, Canada
[5] Ontario Lung Assoc, Provider Educ Program, Toronto, ON, Canada
[6] Inst Univ Cardiol & Pneumol Quebec, Ctr Rech, Serv Pneumol, Quebec City, PQ, Canada
[7] Univ British Columbia, Div Resp, Vancouver, BC V5Z 1M9, Canada