[1] Univ Ottawa, Sch Epidemiol & Publ Hlth, Fac Med, Ottawa, ON, Canada
[2] Ottawa Hosp Res Inst, Clin Epidemiol Program, Ottawa, ON, Canada
[3] Ottawa Hosp, Dept Med, Ottawa, ON, Canada
[4] Univ Ottawa, Ottawa, ON, Canada
[5] Univ Ottawa, Sch Epidemiol & Publ Hlth, Ottawa, ON, Canada
[6] Stanford Hlth Care, Stanford, CA USA
[7] Ottawa Hosp Res Inst, Ottawa, ON, Canada
[8] Childrens Hosp Eastern Ontario Res Inst, Ottawa, ON, Canada
[9] Univ Ottawa, Dept Med, Ottawa, ON, Canada
[10] Ottawa Hosp, Ottawa Hosp Res Inst, Ottawa, ON, Canada