1. Department of Gastroenterology, Tokai Central Hospital, Japan
2. Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Japan
3. Department of Clinical Oncology and Chemotherapy, Nagoya University Hospital, Japan
4. Department of Gastroenterology, Fujita Health University School of Medicine, Japan
5. Department of Endoscopy, Nagoya University Hospital, Japan
6. Department of Gastroenterology and Gastroenterological Oncology, Fujita Health University School of Medicine, Japan