1. Department of Radiation Oncology, Osaka University Graduate School of Medicine, 2-2 (D10) Yamada-oka, Suita, Osaka 565-0871, Japan
2. Department of Radiology, Kaizuka city hospital, 3-10-20 Hori, Kaizuka, Osaka, 597-0015, Japan
3. Department of Radiation Oncology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan
4. Department of Radiation Oncology, Gunma Prefectural Cancer Center, 617-1 Takabayashinishi-machi, Ota, Gunma 373-8550, Japan
5. Department of Radiation Oncology, Saitama Medical Univercity International Medical Center, 1397-1 Yamane, Hidaka, Saitama 350-1298, Japan
6. Department of Radiation Oncology, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, Ibaraki 305-8576, Japan
7. Department of Radiation Oncology, Tokyo Metropolitan Cancer and Infectious diseases Center Komagome Hospital, Honkomagome 3-18-22 Bunkyo, Tokyo 113-8677, Japan
8. Department of Radiation Oncology, Saitama Cancer Center, 780 Komuro, Ina, Kita Adachi-gun, Saitama 362-0806, Japan
9. Department of Radiation Oncology, Saku Central Hospital Advanced Care Center, 3400-28 Nakagomi, Saku, Nagano 385-0051, Japan
10. Department of Radiation Oncology, Kanagawa Cancer Center, 2-3-2 Nakao, Asahi-ku, Yokohama 241-8515, Japan
11. QST Hospital, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
12. Department of Molecular Imaging and Theranostics, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan