1. Department of Medical Oncology, BC Cancer, Vancouver Centre, Vancouver, BC V5Z4E6, Canada
2. Department of Cancer Surveillance Outcomes, BC Cancer, Vancouver Centre, Vancouver, BC V5Z4E6, Canada
3. Department of Radiation Oncology, BC Cancer‑Surrey, Surrey, BC V3V1Z2, Canada
4. Division of Medical Oncology, Ottawa Hospital Cancer Centre, Ottawa, ON K1H8L6, Canada