1. Department of Gastroenterologic Surgery, Division of Cancer Medicine, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
2. Intensive Care Unit, Kanazawa University Hospital, Kanazawa, Japan
3. Department of Surgery, National Hospital Organization Kanazawa Medical Center, Kanazawa, Japan
4. Department of Surgery, Public Central Hospital of Matto Ishikawa, Hakusan, Japan