1) Department of Gastrointestinal Surgery, The University of Tokyo, Tokyo, Japan
2) Japan Association of Women Surgeons
3) Department of Breast Surgery, Showa University, Tokyo, Japan
4) Department of Surgery, Jikei Medical University, Tokyo, Japan
5) Department of Surgery, Kawasaki Hospital, Kanagawa, Japan
6) Department of Breast Surgery, Niigata Cancer Center, Niigata, Japan
7) Department of Surgery, JR Tokyo General Hospital, Tokyo, Japan
8) Department of Cardiovascular Surgery, Tokyo Women’s Medical University, Tokyo, Japan

Sachiyo Nomura¹⁾²⁾, Sadako Akashi²⁾³⁾, Kazumi Kawase²⁾⁴⁾, Kyoko Yorozuya²⁾⁵⁾, Chizuko Kanbayashi²⁾⁶⁾, Mami Ikeda²⁾⁷⁾, Yasuko Tomisawa²⁾⁸⁾