1. Division of Radiation Oncology and Particle Therapy, National Cancer Center Hospital East, Kashiwa
2. Department of Radiation Oncology, St. Luke’s International Hospital
3. Division of General Internal Medicine, Department of Medicine, St. Luke’s International Hospital
4. Department of Radiation Oncology, Juntendo University
5. Sonoda-kai Radiation Oncology Clinic, Tokyo
6. Department of Radiation Oncology, Saitama Medical Center, Saitama Medical University, Kawagoe
7. Department of Radiation Oncology, Saitama Medical University International Medical Center, Hidaka
8. Department of Radiology, the University of Tokyo Hospital, Tokyo, Japan