1. Department of Breast and Endocrine Surgery, Graduate School of Medicine Osaka University Osaka Japan
2. Department of Surgery, Breast Oncology National Hospital Organization Osaka National Hospital Osaka Japan
3. Department of Breast and Endocrine Surgery Nagoya University Graduate School of Medicine Nagoya Japan
4. Department of Breast Surgery Matsuyama Red Cross Hospital Matsuyama Japan
5. Department of Breast and Endocrine Surgery Kumamoto University Hospital Kumamoto Japan
6. Department of Medical Oncology Fukushima Medical University Fukushima Japan
7. Department of Breast and Endocrine Surgery Osaka International Cancer Institute Osaka Japan
8. Department of Breast Oncology NHO Shikoku Cancer Center Matsuyama Japan
9. Department of Surgery Kitakyushu Municipal Medical Center Kitakyushu Japan
10. Department of Breast Surgery Hiroshima City Hiroshima Citizens Hospital Hiroshima Japan
11. Department of Breast Oncology Niigata Cancer Center Hospital Niigata Japan
12. Department of Medical Oncology Toranomon Hospital Tokyo Japan
13. Department of Breast Oncology NHO Kyushu Cancer Center Fukuoka Japan
14. Department of Surgery, Division of Breast Surgical Oncology Showa University School of Medicine Tokyo Japan
15. Department of Breast Surgery Hachinohe City Hospital, Hachinohe Japan
16. Department of Breast Oncology Aichi Cancer Center Hospital Nagoya Japan
17. Department of Breast Oncology Gunma Prefectural Cancer Center Ohta Japan
18. Department of Biomedical Statistics and Bioinformatics Kyoto University Graduate School of Medicine Kyoto Japan
19. Department of Breast Surgery JCHO Kurume General Hospital Kurume Japan
20. Department of Breast Surgery and Oncology Kanagawa Cancer Center Yokohama Japan
21. Department of Breast and Thyroid Surgery Hakuaikai Social Medical Corporation, Sagara Hospital Kagoshima Japan
22. Department of Breast Surgery Kyoto University Graduate School of Medicine Kyoto Japan
23. Breast Oncology Center The Cancer Institute Hospital of JFCR Tokyo Japan