[1] Univ British Columbia, Dept Gynecol Oncol, Vancouver, BC V5Z 1M9, Canada
[2] Juravinski Canc Ctr, Dept Gynecol Oncol, Hamilton, ON, Canada
[3] Inst Clin Evaluat Sci, Programming & Biostat, Toronto, ON, Canada
[4] Univ Hlth Network, Dept Radiat Oncol, Toronto, ON, Canada
[5] Dalhousie Univ, Canc Outcomes Res Program, Halifax, NS, Canada