1. Division of Breast Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
2. Department of Breast Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.
3. Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
4. Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.