1. Department of Gastroenterology & Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
2. Department of Molecular Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
3. Center for Gastroenterology, Teine Keijinkai Hospital
4. Department of Medical Sciences, Toshiba General Hospital
5. Department of Gastroenterology, Toshiba General Hospital