1. Department of Health Science and Technology, Samsung Advanced Institute of Health Science and Technology, Sungkyunkwan University Graduate School, Seoul, Korea.
2. Samsung Biomedical Research Institute, Seoul, Korea.
3. Department of Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea.
4. Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Surgery, Kwandong University College of Medicine Myongi Hospital, Goyang, Korea.