1. Department of Surgery, Bundang Jesaeng General Hospital, Seongnam, Korea.
2. Department of Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Department of Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
4. Division of Breast and Endocrine Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
5. Department of Surgery, 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, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Korea.
8. Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological & Medical Sciences, Seoul, Korea.