1. Department of Surgery, Yonsei University Health System, Yonsei University College of Medicine, Seoul, South Korea.
2. Robot and Minimally Invasive Surgery Center, Yonsei University Health System, Yonsei University College of Medicine, Seoul, South Korea.
3. Department of General Surgery, Trabzon Kanuni Training and Research Hospital, Trabzon, Turkey.
4. Department of Surgery, International St. Mary's Hospital, Inchon, South Korea.
5. Department of Surgery, Keimyung University School of Medicine, Daegu, South Korea.