1. Department of Surgery, Gyeongsang National University College of Medicine and Gyeongsang National University Changwon Hospital, Changwon, Korea.
2. Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Department of Anesthesiology, Gyeongsang National University Changwon Hospital, Changwon, Korea.
4. Department of Surgery, Kosin University Gospel Hospital, Busan, Korea.
5. Department of Surgery, Dongnam Institute of Radiological and Medical Sciences, Cancer Center, Busan, Korea.