1. Duke Cancer Institute; Duke University Medical Center; Durham North Carolina
2. Department of Medicine; Duke University School of Medicine; Durham North Carolina
3. Department of Otorhinolaryngology-Head and Neck Surgery; First Affiliated Hospital; Xi'an Jiaotong University College of Medicine; Xi'an Shaanxi P.R. China
4. Department of Dermatology; Xijing Hospital; Fourth Military Medical University; Xi'an Shaanxi P.R. China
5. Division of Blood and Marrow Transplantation; Duke University Medical Center; Durham North Carolina
6. Division of Head and Neck Surgery and Communication Sciences; Department of Surgery; Duke University Medical Center; Durham North Carolina
7. Department of Otolaryngology-Head and Neck Surgery; Washington University School of Medicine; St. Louis Missouri
8. Department of Epidemiology; Gillings School of Global Public Health; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
9. Departments of Head and Neck Surgery; The University of Texas M.D. Anderson Cancer Center; Houston Texas
10. Department of Epidemiology; The University of Texas M.D. Anderson Cancer Center; Houston Texas
11. Department of Population Health Sciences; Duke University School of Medicine; Durham North Carolina