[1] McGill Univ, Fac Med, Dept Oncol, Montreal, PQ H3G 1A4, Canada
[2] McGill Univ, Fac Med, Dept Med, Montreal, PQ H3G 1A4, Canada
[3] SMBD Jewish Gen Hosp, Lady Davis Inst, Montreal, PQ, Canada
[4] McGill Univ, Sch Nursing, Montreal, PQ H3G 1A4, Canada
[5] Univ Montreal, Fac Sci Infirmieres, Montreal, PQ, Canada
[6] Hop St Justine, Ctr Rech, Inst Univ Geriatrie Montreal, Montreal, PQ H3T 1C5, Canada