1. Department of Breast Surgery , , Matsuyama, Japan
2. Matsuyama Red Cross Hospital , , Matsuyama, Japan
3. Department of Breast and Endocrine Surgery , , Kumamoto, Japan
4. Kumamoto University Graduate School of Medical Sciences , , Kumamoto, Japan
5. Department of Medical Oncology , , Fukushima, Japan
6. Fukushima Medical University , , Fukushima, Japan
7. Department of Surgery , , Osaka, Japan
8. Breast Oncology, National hospital organization, Osaka National Hospital , , Osaka, Japan
9. Department of Breast and Endocrine Surgery , , Osaka, Japan
10. Osaka International Cancer Institute , , Osaka, Japan
11. Department of Breast Oncology , , Matsuyama, Japan
12. NHO Shikoku Cancer Center , , Matsuyama, Japan
13. Department of Surgery , , Kitakyushu, Japan
14. Kitakyushu Municipal Medical Center , , Kitakyushu, Japan
15. Department of Breast Medical Oncology , , Tokyo, Japan
16. The Cancer Institute Hospital of JFCR , , Tokyo, Japan
17. Department of Breast Surgery , , Hiroshima, Japan
18. Hiroshima City Hiroshima Citizens Hospital , , Hiroshima, Japan
19. Department of Breast Oncology , , Niigata, Japan
20. Niigata Cancer Center Hospital , , Niigata, Japan
21. Department of Medical Oncology , , Tokyo, Japan
22. Toranomon Hospital , , Tokyo, Japan
23. Department of Breast Oncology , , Fukuoka, Japan
24. Kyushu Cancer Center , , Fukuoka, Japan
25. Department of Surgery , Division of Breast Surgical Oncology, , Tokyo, Japan
26. Showa University School of Medicine , Division of Breast Surgical Oncology, , Tokyo, Japan
27. Department of Breast Surgery , , Hirosaki, Japan
28. Hirosaki Municipal Hospital , , Hirosaki, Japan
29. Department of Breast Oncology , , Nagoya, Japan
30. Aichi Cancer Center Hospital , , Nagoya, Japan
31. Department of Breast Oncology , , Ohta, Japan
32. Gunma Prefectural Cancer Center , , Ohta, Japan
33. Department of Biomedical Statistics and Bioinformatics , Graduate School of Medicine, , Kyoto, Japan
34. Kyoto University , Graduate School of Medicine, , Kyoto, Japan
35. Department of Breast Surgery , , Kurume, Japan
36. JCHO Kurume General Hospital , , Kurume, Japan
37. Department of Breast Surgery , , Sapporo, Japan
38. Hokkaido University Hospital , , Sapporo, Japan
39. Department of Breast and Endocrine Surgery , , Yokohama, Japan
40. Kanagawa Cancer Center , , Yokohama, Japan
41. Department of Breast Surgical Oncology , , Miyazaki, Japan
42. Sagara Hospital Miyazaki, Miyazaki Hakuaikai Medical Corporation , , Miyazaki, Japan
43. Department of Breast Surgery , Graduate School of Medicine, , Kyoto, Japan
44. Breast Oncology Center , , Tokyo, Japan