1. Osaka International Cancer Institute, Osaka, Japan (Y.T.)
2. National Hospital Organization Hakodate National Hospital, Hakodate, Japan (K.M.)
3. Kurashiki Central Hospital, Kurashiki, Japan (Y.S.)
4. Sapporo Medical Center Nippon Telegraph and Telephone East Corporation, Sapporo, Japan (S.Y.)
5. Ishikawa Prefectural Central Hospital, Kanazawa, Japan (S.Y.)
6. Sano Hospital, Kobe, Japan (M.I.)
7. Kyoto Second Red Cross Hospital, Kyoto, Japan (T.K.)
8. Shizuoka Cancer Center, Suntogun, Shizuoka, Japan (K.H.)
9. Suita Municipal Hospital, Suita, Japan (K.N.)
10. Akashi Medical Center, Akashi, Japan (N.I.)
11. Osaka City General Hospital, Osaka, Japan (T.Y.)
12. Kindai University Faculty of Medicine, Osaka-Sayama, Japan (Y.K.)
13. Tane General Hospital, Osaka, Japan (S.A.)
14. Utsunomiya Memorial Hospital, Tochigi, Japan (Y.A.)
15. Japanese Red Cross Society Wakayama Medical Center, Wakayama, Japan (T.A.)
16. National Hospital Organization Osaka National Hospital, Osaka, Japan (Y.S.)
17. Nihon University School of Medicine, Tokyo, Japan (H.I.)
18. Naha City Hospital, Naha, Japan (Y.K.)
19. Kansai Rosai Hospital, Amagasaki, Japan (T.O.)
20. Nara City Hospital, Nara, Japan (Y.K.)
21. Kumamoto University, Kumamoto, Japan (T.S.)
22. Osaka General Medical Center, Osaka, Japan (T.I.)
23. Hyogo College of Medicine, Nishinomiya, Japan (Y.O.)
24. Tochigi Cancer Center, Utsunomiya, Japan (N.K.)
25. Teine Keijinkai Hospital, Sapporo, Japan (T.T.)
26. Sapporo Higashi Tokushukai Hospital, Sapporo, Japan (R.S.)
27. National Cancer Center Hospital, Tokyo, Japan (T.S.)
28. National Hospital Organization Kyushu Medical Center, Fukuoka, Japan (N.H.)
29. Cancer Institute Hospital, Tokyo, Japan (A.C.)
30. Kyoto Prefectural University of Medicine, Osaka, Japan (H.I.)
31. The University of Tokyo, Tokyo, Japan (M.N.)
32. National Hospital Organization Tokyo Medical Center, Tokyo, Japan (T.U.)