1. Department of Gastroenterology and Hepatology; Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences; Okayama; Japan
2. Department of Gastroenterology and Rheumatology; Fukushima Medical University School of Medicine; Fukushima; Japan
3. Department of Hepatology; Toranomon Hospital; Tokyo; Japan
4. Division of Gastroenterology and Hepatology; Department of Internal Medicine; Jikei University School of Medicine; Tokyo; Japan
5. Department of Gastroenterology and Metabology; Ehime University Graduate School of Medicine; Toon; Japan
6. Department of Digestive and Lifestyle-related Disease; Health Research, Human and Environmental Sciences; Kagoshima University Graduate School of Medical and Dental Sciences; Kagoshima; Japan