[1] Univ Hlth Network, Div Gen Internal Med & Clin Epidemiol, Toronto, ON M5G 2C4, Canada
[2] Toronto Rehabil Inst, Geriatr Program, Toronto, ON, Canada
[3] Princess Margaret Hosp, Dept Med Oncol & Hematol, Toronto, ON M4X 1K9, Canada
[4] Univ Toronto, Dept Med, Toronto, ON, Canada
[5] Univ Toronto, Dept Hlth Policy Management & Evaluat, Toronto, ON, Canada
[6] Univ Toronto, Dept Publ Hlth Sci, Toronto, ON, Canada