1. ICES, Toronto, Ontario, Canada
2. Institute of Health Policy, Management, and Evaluation, University of Toronto, Ontario, Canada
3. Department of Otolaryngology–Head and Neck Surgery, University of Toronto, Ontario, Canada
4. Department of Surgery, University of Toronto, Ontario, Canada
5. Department of Radiation Oncology, Queen’s University, Kingston, Ontario, Canada
6. Department of Otolaryngology–Head and Neck Surgery, Sunnybrook Health Sciences Centre, Toronto, Ontario