[1] Okayama Univ Hosp, Breast & Endocrine Surg, Okayama, Japan
[2] Natl Canc Ctr, Breast & Med Oncol, Tokyo, Japan
[3] Tokyo Univ Hosp, Biostat, Clin Res Support Ctr, Tokyo, Japan
[4] Teine Keijinkai Hosp, Thorac Surg, Sapporo, Hokkaido, Japan
[5] Asahikawa Med Univ, Surg, Asahikawa, Hokkaido, Japan
[6] Gen Hosp, Kobe City Med Ctr, Breast Surg, Kobe, Hyogo, Japan
[7] Osaka Breast Clin, Surg, Osaka, Japan
[8] Kanagawa Canc Ctr, Breast & Endocrine Surg, Yokohama, Kanagawa, Japan
[9] Yao Municipal Hosp, Breast Surg, Osaka, Japan
[10] Nagoya City Univ, Grad Sch Med Sci, Breast Surg, Nagoya, Aichi, Japan
[11] Keimeikai Aihara Hosp, Surg, Osaka, Japan
[12] Natl Canc Ctr Hosp East, Breast & Med Oncol, Kashiwa, Chiba, Japan