1. Department of Radiation Oncology and Image-Applied Therapy , Graduate School of Medicine, , 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, 606-8507 , Japan
2. Kyoto University , Graduate School of Medicine, , 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, 606-8507 , Japan
3. Department of Radiology, Japanese Red Cross Fukui Hospital , 2-4-1 Tsukimi, Fukui, 918-8501 , Japan
4. Department of Radiation Oncology, Kishiwada City Hospital , 1001 Gakuhara-cho, Kishiwada, Osaka, 596-8501 , Japan
5. Department of Radiation Oncology, Kobe City Medical Center General Hospital , 2-1-1, Minatojimaminamimachi, Chuo-ku, Kobe, Hyogo, 650-0047 , Japan
6. Department of Radiology, National Hospital Organization Kyoto Medical Center , 1-1 Fukakusamukaihata-cho, Fushimi-ku, Kyoto, 612-8555 , Japan
7. Department of Radiation Oncology, Kurashiki Central Hospital , 1-1-1 Miwa, Kurashiki, Okayama, 710-8602 , Japan
8. Department of Radiation Oncology, Hyogo Prefectural Amagasaki General Medical Center , 2-17-77 Higashinanba-cho, Amagasaki, Hyogo, 660-8550 , Japan
9. Department of Radiation Oncology, Kindai University Faculty of Medicine , 377-2, Onohigashi, Osakasayama-shi, Osaka, 589-8511 , Japan
10. Department of Radiation Oncology, Osaka Red Cross Hospital , 5-30 Fudegasaki-cho, Tennoji-ku, Osaka, 543-8555 , Japan
11. Department of Radiation Oncology , Kitano Hospital, , 2-4-20, Ohgimachi, Kita-ku, Osaka, 530-8480 , Japan
12. Tazuke Kofukai Medical Research Institute , Kitano Hospital, , 2-4-20, Ohgimachi, Kita-ku, Osaka, 530-8480 , Japan
13. Department of Radiation Oncology, Kyoto Katsura Hospital , 17 Yamadahirao-cho, Nishikyo-ku, Kyoto, 615-8256 , Japan
14. Department of Radiation Oncology, Kyoto City Hospital , 1-2 Mibuhigashitakada-cho, Nakagyo-ku, Kyoto, 604-8845 , Japan
15. Department of Radiation Oncology, Tenri Hospital , 200 Mishima-cho, Tenri, Nara, 632-8552 , Japan
16. Department of Radiation Oncology, Shinko Hospital , 1-4-47 Wakihama-cho, Chuo-ku, Kobe, Hyogo, 651-0072 , Japan
17. Department of Radiation Oncology, Shizuoka City Shizuoka Hospital , 10-93 Otemachi, Aoi-ku, Shizuoka, 420-8630 , Japan
18. Department of Respiratory Medicine , Graduate School of Medicine, , 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, 606-8507 , Japan