1. Department of Radiation Oncology, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Department of Radiotherapy, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
3. Department of Radiology, Tokyo Medical University, Tokyo, Japan
4. Department of Radiology, University of Yamanashi, Yamanashi, Japan
5. Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
6. Department of Radiation Oncology, Tokyo Bay Advanced Imaging and Radiation Oncology Clinic Makuhari, Chiba, Japan
7. Department of Therapeutic Radiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
8. Department of Radiological Sciences, Faculty of Health Sciences, Komazawa University, Tokyo, Japan
9. Department of Radiation Oncology and Image-applied Therapy, Kyoto University Graduate School of Medicine, Kyoto, Japan