1. Department of Surgery, Center for Breast Cancer, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
2. Department of Surgery, Korea Cancer Center Hospital, Seoul, Korea.
3. Department of Surgery, Cheil General Hospital & Women's Healthcare Center, Kwandong University College of Medicine, Seoul, Korea.
4. Department of Surgery, Yonsei University College of Medicine, Seoul, Korea.
5. Breast Care Center, Seoul National University Bundang Hospital, Seongnam, Korea.
6. Department of Surgery, Ewha Womans University Mokdong Hospital, Ewha Womans University School of Medicine, Seoul, Korea.
7. Department of Surgery, Konkuk University School of Medicine, Seoul, Korea.