[1] McMaster Univ, Dept Oncol, Hamilton, ON, Canada
[2] Univ Toronto, Dept Radiat Oncol, Toronto, ON, Canada
[3] Univ Toronto, Dept Hlth Policy Management & Evaluat, Toronto, ON, Canada
[4] Princess Margaret Hosp, Ontario Canc Inst, Dept Psychosocial Oncol, Toronto, ON M4X 1K9, Canada
[5] Princess Margaret Hosp, Ontario Canc Inst, Dept Palliat Care, Toronto, ON M4X 1K9, Canada
[6] Johns Hopkins Univ, Dept Hlth Policy & Management Oncol & Med, Baltimore, MD USA