1. National Cancer Center Hospital East, Kashiwa, Japan;
2. Aichi Cancer Center Hospital, Nagoya, Japan;
3. Nara Medical University, Kashihara, Japan;
4. National Cancer Center Hospital, Tokyo, Japan;
5. Teine Keijinkai Hospital, Sapporo, Japan;
6. Shizuoka Cancer Center, Shizuoka, Japan;
7. Nara City Hospital, Kashihara, Japan;
8. Uonuma Institute of Community Medicine, Minamiuonuma, Japan;
9. Shinshu University School of Medicine, Matsumoto, Japan;
10. Niigata Cancer Center Hospital, Niigata, Japan;
11. Ryugasaki Saiseikai Hospital, Ryugasaki, Japan;
12. Niigata University, Niigata, Japan;
13. Ryukyu University Hospital, Nishihara, Japan;
14. Kindai University Faculty of Medicine, Osaka-Sayama, Japan;
15. Osaka General Medical Center, Osaka, Japan;
16. Gunma University Graduate School of Medicine, Maebashi, NY, Japan;
17. National Cancer Center, Tokyo, Japan;