1. Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
2. Department of Medical Oncology, BC Cancer, Victoria, BC, Canada
3. University of British Columbia, Vancouver, BC, Canada
4. Department of Radiation Oncology, University of Chicago, Faculty of Medicine, Chicago, IL
5. University of Chicago Medicine Comprehensive Cancer Center at Silver Cross Hospital, New Lenox, IL
6. Department of Oncology, University of Calgary, Calgary, AB, Canada
7. Department of Medical Oncology, Tom Baker Cancer Centre, Calgary, AB, Canada
8. Department of Surgery, Division of Radiation Oncology, University of British Columbia, Faculty of Medicine, Vancouver, BC, Canada
9. Department of Radiation Oncology, BC Cancer, Vancouver, BC, Canada