1. Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
2. Department of Anatomic Pathology, Pathological Sciences; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
3. Department of Molecular Oncology; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
4. Division of Gastro-intestinal Surgery, Department of Surgery; Kobe Graduate School of Medicine; Kobe Japan