1. Department of Radiation Oncology; Johns Hopkins Medical Institute; Baltimore Maryland
2. Department of Otolaryngology - Head and Neck Surgery; Johns Hopkins Medical Institute; Baltimore Maryland
3. Department of Radiation Oncology; University of Toronto; Toronto Ontario Canada
4. Department of Otolaryngology; University of Pittsburgh; Pittsburgh Pennsylvania
5. VA Pittsburgh Health System; Pittsburgh Pennsylvania
6. Department of Otolaryngology; Mount Sinai Hospital; New York New York
7. Department of Surgery - Head and Neck Service; Memorial Sloan Kettering Cancer Center; New York New York
8. Department of Medicine - Endocrinology Service; Memorial Sloan Kettering Cancer Center; New York New York
9. Department of Radiation Oncology; Memorial Sloan Kettering Cancer Center; New York New York
10. Department of Otolaryngology, Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts