[1] Univ Toronto, Dept Radiat Oncol, Toronto, ON, Canada
[2] Univ Toronto, Dept Family & Community Med, Toronto, ON M5S 1A1, Canada
[3] Univ Toronto, Dept Psychiat, Toronto, ON, Canada
[4] Univ Toronto, Div Hematol & Med Oncol, Dept Med, Toronto, ON, Canada
[5] Univ Hlth Network, Princess Margaret Hosp, Dept Psychosocial Oncol, Toronto, ON, Canada
[6] Univ Hlth Network, Princess Margaret Hosp, Dept Palliat Care, Toronto, ON, Canada
[7] Univ Hlth Network, Princess Margaret Hosp, Dept Biostat, Toronto, ON, Canada