1 From the Department of Supportive Care, Princess Margaret Cancer Centre (M.L., S.W., G.R.), the Faculty of Medicine (M.L., M.G., G.O., G.R.) and the Joint Centre for Bioethics (A.H.), University of Toronto, and the University Health Network (M.L. S.W., M.E., M.G., A.H., G.O., G.R.) - all in Toronto.