1. Division of Colon and Rectal Surgery, Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
2. Division of Colon and Rectal Surgery, Department of Surgery, Daegu Catholic University Hospital, School of Medicine Catholic University of Daegu, Daegu, Republic of Korea
3. Department of Surgery, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Jalan Hospital, Selangor, Malaysia
4. Department of Urology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea