1. Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
2. Department of Surgery, College of Medicine, The Catholic University of Korea, 222 Banpodaero, Seoul, 06591, Korea
3. Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
4. Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, 06591, Korea