1. Head and Neck Oncology Service, Department of Medicine; Memorial Sloan Kettering Cancer Center; New York New York
2. Department of Medicine; Weil Medical College of Cornell University; New York New York
3. Epidemiology and Biostatistics; Memorial Sloan Kettering Cancer Center; New York New York
4. Department of Radiation Oncology; Memorial Sloan Kettering Cancer Center; New York New York
5. Department of Public Health; Weill Medical College of Cornell University; New York New York