1. Department of Radiation Medicine & Applied Sciences University of California, San Diego La Jolla California
2. La Jolla Center for Precision Radiation Medicine La Jolla California
3. Veterans Health AdministrationSan Diego Health Care System La Jolla California
4. Division of Epidemiology and Biostatistics San Diego State University School of Public Health San Diego California
5. Herbert Wertheim School of Public Health and Human Longevity Science University of California, San Diego La Jolla California
6. Division of Radiation Oncology Faculty of Medicine Thammasat University Pathum Thani Thailand
7. Department of Radiation Oncology Stanford University Stanford California
8. Department of Otolaryngology Head and Neck Surgery Johns Hopkins University Baltimore Maryland