1. Gastroenterological Surgery; Nagoya University Graduate School of Medicine; 65 Tsurumai-cho, Showa-ku Nagoya 466-8550 Japan
2. Department of Surgery; Nagoya Medical Center; Nagoya Japan
3. Department of Clinical Laboratory Medicine; Nagoya University Hospital; Nagoya Japan
4. Department of Transfusion Medicine; Nagoya University Hospital; Nagoya Japan