1. Department of Otolaryngology/Head and Neck Surgery, Cancer Care and Epidemiology, Queen's University, Kingston, Canada.
2. Department of Otolaryngology/Head and Neck Surgery/Surgical Oncology, Princess Margaret Cancer Center, University of Toronto, Toronto, Canada.
3. Cancer Care and Epidemiology, Department of Public Health Sciences, Queen's University, Kingston, Canada.
4. Cancer Care and Epidemiology, Queen's University, Kingston, Canada.
5. Department of Pathology and Laboratory Sciences, Queen's University, Kingston, Canada.