1. a Hokkaido University School of Medicine, Sapporo, Japan;
2. b Saitama International Medical Center, Saitama, Japan;
3. c Tohoku University Hospital, Sendai, Japan;
4. d Miyagi Cancer Center, Miyagi, Japan;
5. e Sendai Kousei Hospital, Sendai, Japan;
6. f Niigata University Medical and Dental Hospital, Niigata, Japan;
7. g Kokka-komuin Kyosai-Kumiai Rengokai Sapporo Medical Center, Sapporo, Japan;
8. h National Hospital Organization Hokkaido Cancer Center, Sapporo, Japan;
9. i Hokkaido University Graduate School of Medicine, Sapporo, Japan;
10. j Kesennuma City Hospital, Kesennuma, Japan;
11. k Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan;
12. l Hokkaido Social Insurance Hospital, Hokkaido, Japan;
13. m Nippon Medical School, Sendagi, Japan;
14. n Graduate School of Medicine, Hirosaki University, Hirosaki, Japan;
15. o Yokohama City University Medical Center, Yokohama, Japan;
16. p Saitama Medical University, Saitama, Japan;
17. q Tohoku University Graduate School of Medicine, Sendai, Japan