1. Department of Endoscopy, Aichi Cancer Center Hospital, Nagoya, Japan
2. Department of Gastroenterology, Aichi Cancer Center Hospital, Nagoya, Japan
3. Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Nagoya, Japan
4. Department of Medical Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
5. Department of Pathology and Molecular Diagnostics, Aichi Cancer Center Hospital, Nagoya, Japan