1. Department of Otolaryngology-Head and Neck Surgery; New York University; New York NY
2. Department of Otolaryngology-Head and Neck Surgery and Surgical Oncology; Sunnybrook Odette Cancer Centre, University of Toronto; Toronto Ontario Canada
3. Department of Radiation Oncology; Princess Margaret Cancer Center, University of Toronto; Toronto Ontario Canada
4. Department of Biostatistics; Princess Margaret Cancer Center, University of Toronto; Toronto Ontario Canada