1 Department of Otolaryngology-Head and Neck Surgery, Wharton Head and Neck Program, University Health Network, Princess Margaret Cancer Centre, Toronto, ON, Canada.
2 Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Toronto, ON, Canada.
3 Department of Pathology, University Health Network, Princess Margaret Cancer Centre, Toronto, ON, Canada.
4 Department of Biostatistics, University Health Network, Princess Margaret Cancer Centre, Toronto, ON, Canada.
5 Department of Otolaryngology-Head and Neck Surgery, Wharton Head and Neck Program, University Health Network, Princess Margaret Cancer Centre, Toronto, ON, Canada. david.goldstein@uhn.ca.
6 Princess Margaret Hospital, Wharton Head and Neck Centre, 610 University Avenue, 3rd Floor, Toronto, M5G 2 M9, ON, Canada. david.goldstein@uhn.ca.