[1] Ottawa Hosp Res Inst, Ottawa, ON, Canada
[2] Ottawa Hosp, Div Hematol, Ottawa, ON, Canada
[3] Ottawa Hosp, Dept Med, Ottawa, ON, Canada
[4] Univ Ottawa, Ottawa, ON, Canada
[5] Univ Ottawa, Sch Epidemiol, Publ Hlth & Prevent Med, Ottawa, ON, Canada
[6] Ottawa Hosp Res Inst, Clin Epidemiol Program, Ottawa, ON, Canada