Affiliation: | 1. Department of Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School of Medicine, Tokushima, Tokushima, Japan;2. Department of Community Medicine for Gastroenterology and Oncology, Institute of Biomedical Sciences, Tokushima University Graduate School of Medicine, Tokushima, Tokushima, Japan;3. Department of Gastroenterology and Neurology, Kagawa University Graduate School of Medicine, Miki-cho, Kagawa, Japan;4. Department of Gastroenterology and Hepatology, Kochi University Graduate School of Medicine, Kochi, Kochi, Japan;5. Department of Gastroenterology and Hepatology, Takamatsu Red Cross Hospital, Takamatsu, Kagawa, Japan |