1. Department of Surgery, Daejeon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Surgery, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
3. Department of Surgery, Jeonbuk National University Medical School, Jeonju, Korea.
4. Department of Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
6. Department of Surgery, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Breast-Thyroid Center, Saegyaero Hospital, Busan, Korea.