1. From the Department of Radiation Oncology, University of Washington, 1959 NE Pacific Ave, Seattle, WA 98195-6043 (U.P.); Ear Nose and Throat Institute, University Hospitals Seidman Cancer Center, Case Western Reserve University, Cleveland, Ohio (P.L.); Department of Medicine, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tenn (M.K.G.); and Department of Radiology, University of California, San Francisco, San Francisco, Calif (C.M.G.).