1. Department of Surgical Oncology, Princess Margaret Hospital, Department of Otolaryngology-Head and Neck Surgery; University of Toronto; Toronto Ontario Canada
2. Department of Otolaryngology-Head and Neck Surgery; University of Michigan; Ann Arbor Michigan
3. Department of Radiation Oncology, Princess Margaret Hospital; University of Toronto; Toronto Ontario Canada
4. Division of Health Care and Outcomes Research, Toronto Western Research Institute, University Health Network; University of Toronto; Toronto Ontario Canada