[1] Univ Toronto, Dept Med Oncol, Toronto, ON, Canada
[2] Princess Margaret Hosp, Toronto, ON M4X 1K9, Canada
[3] McGill Univ, Dept Oncol, Montreal, PQ, Canada
[4] McGill Univ, Jewish Gen Hosp, Montreal, PQ H3T 1E2, Canada
[5] Dalhousie Univ, Div Hematol, Halifax, NS, Canada
[6] Queen Elizabeth 2 Hlth Sci Ctr, Halifax, NS, Canada
[7] Univ Calgary, Dept Oncol, Calgary, AB, Canada
[8] Univ Calgary, Dept Med, Calgary, AB, Canada
[9] Tom Baker Canc Clin, Calgary, AB, Canada
[10] New Evidence, Toronto, ON, Canada
[11] Univ British Columbia, Div Med Oncol, Vancouver, BC V5Z 1M9, Canada
[12] British Columbia Canc Agcy, Vancouver, BC V5Z 4E6, Canada