[1] Univ Calgary, Fac Med, Tom Baker Canc Ctr, Dept Oncol, 1331 29th St NW, Calgary, AB T2N 4N2, Canada
[2] Univ Manitoba, Canc Care Manitoba, 675 McDermot Ave, Winnipeg, MB R3E 0V9, Canada
[3] Univ Calgary, Dept Family Med, 1403 29 St NW, Calgary, AB T2N 2T9, Canada
[4] Univ Toronto, Dept Family & Community Med, 500 Univ Ave, Toronto, ON M5G 1V7, Canada
[5] Univ Toronto, Princess Margaret Canc Ctr, Radiat Med Program, 610 Univ Ave, Toronto, ON M5G 2C1, Canada
[6] Northern Ontario Sch Med, Ramsey Lake Rd, Sudbury, ON P3E 6H6, Canada
[7] Univ British Columbia, Vancouver Canc Ctr, BC Canc, 600 West 10th Ave, Vancouver, BC VSZ 4E6, Canada
[8] Univ Western Ontario, London Reg Canc Ctr, 800 Commissioners Rd East, London, ON N6A 5W9, Canada