[1] Univ Toronto, Med, Toronto, ON, Canada
[2] Univ Western Ontario, Med, London, ON, Canada
[3] Royal Victoria Hosp, Med Oncol, Barrie, ON, Canada
[4] Royal Victoria Hlth Ctr, Med Oncol, Barrie, ON, Canada
[5] Royal Victoria Hosp, Barrie, ON, Canada
[6] Princess Margaret Canc Ctr, Dept Med Oncol & Hematol, Toronto, ON, Canada