[1] Toho Univ, Omori Med Ctr, Radiol, Tokyo, Japan
[2] Tohoku Univ, Radiat Oncol, Sendai, Miyagi, Japan
[3] Univ Yamanashi, Dept Radiol, Yamanashi, Japan
[4] Univ Tokyo, Radiol, Tokyo, Japan
[5] Okayama Univ, Proton Beam Therapy, Okayama, Japan
[6] Niigata Canc Ctr, Radiat Oncol, Niigata, Japan
[7] Miyakojima Igrt Clin, Radiat Oncol, Osaka, Japan
[8] Hirosaki Univ, Radiol, Hirosaki, Aomori, Japan
[9] Kyoto Univ, Radiat Oncol & Image Appl Therapy, Kyoto, Japan
[10] Keiyukai Sapporo Hosp, Radiat Oncol, Sapporo, Hokkaido, Japan
[11] Seirei Mikatahara Gen Hosp, Radiat Oncol, Shizuoka, Japan
[12] Fukuyama City Hosp, Radiat Oncol, Hiroshima, Japan
[13] Shizuoka City Shimizu Hosp, Radiat Oncol, Shizuoka, Japan
[14] Nagoya City Univ, Radiol, Nagoya, Aichi, Japan
[15] Univ Occupat & Environm Hlth, Radiol, Fukuoka, Fukuoka, Japan
[16] Shikoku Canc Ctr, Radiat Oncol, Shikoku, Ehime, Japan
[17] Iwate Med Univ, Radiol, Morioka, Iwate, Japan
[18] Iwate Prefectural Cent Hosp, Radiat Oncol, Morioka, Iwate, Japan
[19] Self Def Forces Cent Hosp, Radiol, Tokyo, Japan
[20] Nigata Prefectural Cent Hosp, Radiol, Niigata, Japan
[21] Matsushita Mem Hosp, Radiol, Osaka, Japan
[22] Ishikawa Prefectural Cent Hosp, Radiat Oncol, Kanazawa, Ishikawa, Japan
[23] Nagasaki Prefectural Shimabara Hosp, Radiol & Radiotherapy, Nagasaki, Japan
[24] Nagoya Univ Hosp, Radiol, Nagoya, Aichi, Japan
[25] Hokkaido Univ Hosp, Radiol, Sapporo, Hokkaido, Japan
[26] Juntendo Univ Hosp, Radiol, Tokyo, Japan
[27] Sapporo City Gen Hosp, Radiat Oncol, Sapporo, Hokkaido, Japan
[28] Ishikiri Seiki Hosp, Radiat Oncol, Osaka, Japan
[29] Osaka Univ, Carbon Ion Radiotherapy, Osaka, Japan
[30] Gunma Univ, Heavy Ion Med Ctr, Maebashi, Gunma, Japan