1. Department of Otolaryngology‐Head and Neck Surgery, Princess Margaret Cancer Centre University of Toronto Toronto Ontario Canada
2. Department of Radiation Oncology, Princess Margaret Cancer Centre University of Toronto Toronto Ontario Canada
3. Department of Biostatistics, Princess Margaret Cancer Centre University of Toronto Toronto Ontario Canada
4. Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre University of Toronto Toronto Ontario Canada
5. Department of Otolaryngology‐Head and Neck Surgery, Sinai Health System University of Toronto Toronto Ontario Canada