1. Divisions of Radiation Oncology, National Cancer Center Hospital East, Kashiwa
2. Department of Radiology, Saga University Faculty of Medicine, Saga
3. Divisions of Radiation Oncology and Particle Therapy, National Cancer Center Hospital East, Kashiwa
4. Divisions of Plastic and Reconstructive Surgery, National Cancer Center Hospital East, Kashiwa
5. Divisions of Head and Neck Medical Oncology, National Cancer Center Hospital East, Kashiwa
6. Divisions of Head and Neck Surgery, National Cancer Center Hospital East, Kashiwa, Japan