1. Department of Radiation Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
2. Department of Radiology, University of Yamanashi Graduate School of Medical Science, Chuo, Japan
3. JCOG Data Center, Center for Research Administration and Support, National Cancer Center, Tokyo, Japan
4. Department of Radiation Oncology and Image-Applied Therapy, Graduate School of Medicine, Kyoto University, Kyoto, Japan
5. Department of Radiation Oncology, Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Mizuho-ku Nagoya, Japan
6. Department of Radiation Oncology, Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo, Japan
7. Department of Image-based Medicine, Institute of Biomedical Research and Innovation, Kobe, Japan
8. Department of Radiation Oncology, Kobe City Medical Center General Hospital, Kobe, Japan
9. Department of Clinical Radiology, Kyushu University Graduate School of Medicine, Fukuoka, Japan
10. Department of Radiation Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
11. Department of Radiation Oncology, National Cancer Center Hospital, Tokyo, Japan