1. Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan
2. Department of Gastroenterology, JCHO Kyoto Kuramaguchi Medical Center, Kyoto, Japan
3. Department of Gastroenterology, Osaka General Hospital of West Japan Railway Company, Osaka, Japan
4. Department of Gastroenterology, Fukuchiyama City Hospital, Kyoto, Japan
5. Department of Gastroenterology, Nishijin Hospital, Kyoto, Japan
6. Department of Surgical Pathology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan