1. Head and Neck Service, Department of Surgery; Memorial Sloan Kettering Cancer Center; New York New York
2. VA Outcomes Group, Department of Veterans Affairs; Medical Center; White River Junction Vermont
3. Department of Surgery; Geisel School of Medicine at Dartmouth; The Dartmouth Institute for Health Policy and Clinical Practice; Hanover New Hampshire
4. Endocrinology Service, Department of Medicine; Memorial Sloan Kettering Cancer Center; New York New York