Zhen-Yu Wu1,2, Jing Han2, Jin Sup Eom3, Sei-Hyun Ahn1, BeomSeok Ko4. 1. Division of Breast Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea. 2. Department of Breast Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China. 3. Department of Plastic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea. 4. Division of Breast Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea. spdoctorko@gmail.com.