¹Department of Surgery, Seoul National University Hospital, Seoul,
²Department of Surgery, Kyungpook National University Medical Center, Daegu,
³Department of Surgery, Kosin University Gospel Hospital, Busan,
⁴Department of Surgery, Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul,
⁵Department of Surgery, Chonnam National University Hwasun Hospital, Gwangju,
⁶Department of Surgery, Seoul National University Bundang Hospital, Seongnam,
⁷Department of Surgery, Ajou University Hospital, Suwon, Korea

Received: 14 December 1901   • Revised: 14 December 1901   • Accepted: 14 December 1901