1. Hokkaido University Hospital, Sapporo, Japan (S.O., M.T.)
2. Tokyo Medical and Dental University, Tokyo, Japan (K.K.)
3. Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan (O.D., Y.N.)
4. Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan (S.K.)
5. Tohoku University Graduate School of Medicine, Sendai, Japan (T.K.)
6. National Hospital Organization Shikoku Cancer Center, Matsuyama, Japan (S.H.)
7. Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan (H.K.)
8. Kawasaki Medical School, Okayama, Japan (T.M.)
9. Asahi University Hospital, Gifu, Japan (N.Y.)
10. Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan (F.S.)
11. Nagasaki University Hospital, Nagasaki, Japan (K.H.)
12. Hiroshima University Hospital, Hiroshima, Japan (S.O.)
13. North Medical Center, Kyoto Prefectural University of Medicine, Kyoto, Japan (K.K.)
14. Saga University, Saga, Japan (R.S.)
15. Oita University, Oita, Japan (K.M.)
16. Kawasaki Medical School General Medical Center, Okayama, Japan (M.S., K.H.)
17. Osaka Medical College, Osaka, Japan (T.T.)
18. Otaru Ekisaikai Hospital, Otaru, Japan (S.K.)
19. Soka Municipal Hospital, Soka, Japan (T.K.)
20. Kyoto Prefectural University of Medicine, Osaka, Japan (H.I.)
21. Shizuoka Cancer Center, Shizuoka, Japan (K.M.)
22. National Hospital Organization Hakodate National Hospital, Hakodate, Japan (M.K.)