1. Department of Gastroenterological Surgery; Faculty of Medicine, Kagawa University; Kagawa Japan
2. Division of Refractory Cancer Research; National Cancer Center Research Institute; Tokyo Japan
3. Department of Pathology; Faculty of Medicine, Kagawa University; Kagawa Japan
4. Department of Gastroenterology and Neurology; Faculty of Medicine, Kagawa University; Kagawa Japan
5. Department of Internal Medicine; Kagawa Prefectural Central Hospital; Kagawa Japan
6. Department of Surgery; Takamatsu Red Cross Hospital; Kagawa Japan
7. Department of Surgery; Takamatsu Municipal Hospital; Kagawa Japan
8. Department of Surgery; Social Insurance Ritsurin Hospital; Kagawa Japan
9. Department of Internal Medicine; Kagawa Rosai Hospital; Kagawa Japan