1. Department of Otolaryngology–Head and Neck Surgery, University of Michigan Health System, Ann Arbor
2. Department of Biostatistics, University of Michigan Health System, Ann Arbor
3. Department of Radiation Oncology, University of Michigan Health System, Ann Arbor
4. Department of Internal Medicine, University of Michigan Health System, Ann Arbor
5. Department of Otolaryngology–Head and Neck Surgery, The Ohio State University, Wexner Medical Center, Columbus
6. Department of Otolaryngology, University of Toronto, Toronto, Ontario, Canada