1. Department of Gastroenterology; Aichi Cancer Center Hospital; 1-1 Kanokoden, Chikusa-ku Nagoya Aichi 464-8681 Japan
2. Department of Tropical Medicine and Gastroenterology; Assiut University Hospital; Assiut Egypt
3. Department of Medical Hepatology; Institute of Liver and Biliary Sciences (ILBS); Delhi India
4. Department of Pathology and Molecular Diagnostics; Aichi Cancer Center Hospital; Nagoya Japan
5. Department of Surgery; Aichi Cancer Center Hospital; Nagoya Japan
6. Department of Endoscopy; Aichi Cancer Center Hospital; Nagoya Japan
7. Department of Gastroenterology; Jichi Medical University; Tochigi Japan