1. Department of Radiology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan
2. Department of Radiation Oncology, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
3. Department of Therapeutic Radiology, Kanazawa Medical Center, Kanazawa, Ishikawa, Japan
4. Radiation Therapy Center, Fukui Saiseikai Hospital, Fukui, Japan
5. Department of Therapeutic Radiology, Ishikawa Prefectural Central Hospital, Kanazawa, Ishikawa, Japan
6. Department of Radiology, Graduate School of Medicine, Gifu University, Gifu, Japan