1. Japan Society for Reproductive Medicine Male Infertility Special Interest Group (SIG)
2. Department of Urology, Reproduction Center, Yokohama City University Medical Center
3. Department of Urology, Jichi Medical University
4. International Center for Reproductive Medicine, Dokkyo Medical University Saitama Medical Center
5. Department of Urology, Nagoya City University West Medical Center
6. Department of Urology, Chiba University Graduate School of Medicine
7. Department of Urology, Toho University School of Medicine
8. Department of Urology, Kameda Medical Center
9. Department of Urology, Graduate School of Medicine, Yamaguchi University
10. Department of Urology and Andrology, Kansai Medical University
11. Division of Urology, Department of Surgery Related, Kobe University Graduate School of Medicine
12. Department of Urology, Juntendo University Urayasu Hospital
13. Department of Urology, Osaka University Graduate School of Medicine