1. Department of Pathology, Division of Molecular Medicine and Medical Genetics, Kobe University Graduate School of Medicine, Kobe, Hyogo 6500017, Japan
2. Centre for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo 6500017, Japan
3. Department of Internal Medicine, Division of Gastroenterology, Kobe University Graduate School of Medicine, Kobe, Hyogo 6500017, Japan
4. Department of Internal Medicine, Tokushima Prefectural Naruto Hospital, Tokushima 7728503, Japan
5. Department of Hepatology, Osaka University Graduate School of Medicine, Osaka 5588585, Japan