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