1. Department of Urology Sapporo Medical University School of Medicine Sapporo Japan
2. Yakumo General Hospital Yakumo Japan
3. Hokkaido Prefectural Haboro Hospital Haboro Japan
4. Rumoi Municipal Hospital Rumoi Japan
5. Sapporo Central Hospital Sapporo Japan
6. Hokkaido Social Work Association Obihiro Hospital Obihiro Japan
7. Takikawa Municipal Hospital Takikawa Japan
8. Muroran City General Hospital Muroran Japan
9. Saiseikai Otaru Hospital Otaru Japan
10. JCHO Hokkaido Medical Center Sapporo Japan
11. Kushiro Red Cross Hospital Kushiro Japan
12. Asahikawa Red Cross Hospital Asahikawa Japan
13. Hokkaido Medical Center Sapporo Japan
14. Hakodate Goryoukaku Hospital Hakodate Japan
15. Kuriyama Red Cross Hospital Kuriyama Japan
16. Hokkaido Social Work Association Toya Hospital Toyako Japan
17. JCHO Noboribetsu Medical Center Noboribetsu Japan
18. Oji General Hospital Tomakomai Japan
19. NTT‐East Sapporo Hospital Sapporo Japan
20. Nemuro City Hospital Nemuro Japan