1. Department of Otolaryngology, University of Minnesota School of Medicine, Minneapolis, Minnesota, USA
2. Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA
3. Division of Otorhinolaryngology, Centre Hospitalier de l’Université de Montréal, Montreal, Quebec, Canada
4. Biostatistics Facility, University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania, USA
5. Department of Head and Neck Surgery, University of California, Los Angeles, Los Angeles, California, USA
6. Department of Hematology/Oncology, Department of Medicine, University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania, USA
7. Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
8. Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania, USA