1. Department of Radiation Oncology; Kaiser Permanente Medical Center; Los Angeles California
2. Division of Radiation Oncology; The University of Texas MD Anderson Cancer Center; Houston Texas
3. Department of Thoracic/Head and Neck Medical Oncology; The University of Texas MD Anderson Cancer Center; Houston Texas
4. Department of Head and Neck Surgery; The University of Texas MD Anderson Cancer Center; Houston Texas
5. Department of Radiation Physics; The University of Texas MD Anderson Cancer Center; Houston Texas