1. Department of Otolaryngology-Head and Neck Surgery; University Health Network; Princess Margaret Cancer Centre; University of Toronto; Toronto Ontario Canada
2. Ontario Cancer Institute; University Health Network; Princess Margaret Cancer Centre; Toronto Ontario Canada
3. Department of Radiation Oncology; Princess Margaret Cancer Centre, University of Toronto; Toronto Ontario Canada
4. Department of Medical Oncology and Hematology; Princess Margaret Cancer Centre; University Health Network; Toronto Ontario Canada