[1] Princess Margaret Canc Ctr, Dept Support Care, Toronto, ON, Canada
[2] Univ Toronto, Fac Med, Dept Psychiat, Toronto, ON M5S 1A1, Canada
[3] Univ Toronto, Joint Ctr Bioeth, Toronto, ON, Canada
[4] Univ Toronto, Leslie Dan Fac Pharm, Toronto, ON, Canada
[5] Queens Univ, Dept Publ Hlth Sci, Kingston, ON, Canada
[6] Queens Univ, Div Canc Care & Epidemiol, Kingston, ON, Canada
[7] Canadian Canc Trials Grp, Kingston, ON, Canada