Institution: | 1. Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota, USA;2. Department of Biostatistics & Information, Mayo Clinic, Rochester, Minnesota, USA;3. Department of Radiation Oncology, Mayo Clinic, Scottsdale, Arizona, USA;4. Department of Otolaryngology, Mayo Clinic, Rochester, Minnesota, USA;5. Division of Medical Oncology, Mayo Clinic, Rochester, Minnesota, USA |