1. Department of Breast Surgery Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan
2. Department of Breast and Endocrine Surgery Okayama University Hospital Okayama Japan
3. Department of Breast Oncology Gunma Prefectural Cancer Center Gunma Japan
4. Department of Breast and Endocrine Surgical Oncology Tohoku University Graduate School of Medicine Sendai Japan
5. Department of Breast and Endocrine Surgery Kanagawa Cancer Center Yokohama Japan
6. Department of Surgery Nahanishi Clinic Naha Okinawa Japan
7. Department of Medical Oncology Sagara Hospital Kagoshima City Kagoshima Japan
8. Advanced Cancer Translational Research Institute Showa University Tokyo Japan
9. Department of Breast Surgery Hokkaido University Hospital Sapporo Japan
10. Department of Breast Surgery Osaka Red Cross Hospital Osaka Japan
11. Department of Breast Oncology Niigata Cancer Center Hospital Niigata Japan
12. Department of Breast Surgery, School of Medicine Fukushima Medical University Fukushima Japan
13. Kyowa Kirin Co., Ltd. Tokyo Japan
14. Department of Medical Oncology Fukushima Medical University Fukushima Japan