1. Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
2. Department of Radiology Centre for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
3. Department of Surgery, Ajou University Medical Center, Ajou University College of Medicine, Suwon, Korea
4. Department of Surgery, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
5. Department of Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea