1. Department of Internal Medicine; Fujita Health University Nanakuri Sanatorium; Mie Japan
2. Department of Medical Sciences; Toshiba General Hospital; Tokyo Japan
3. Division of Virology; Department of Infection and Immunity; Jichi Medical University School of Medicine; Tochigi Japan
4. Department of Gastroenterology and Hepatology; Gifu Municipal Hospital; Gifu Japan
5. Department of Internal Medicine; Kuwana West Medical Center; Kuwana Japan
6. Department of Forensic Medicine; Nagoya City University Graduate School of Medical Sciences; Aichi Japan
7. Department of Gastroenterology; Suzuka General Hospital; Mie Japan
8. Department of Gastroenterology and Hepatology; Division of Clinical Medicine and Biomedical Science; Institute of Medical Sciences; Mie University Graduate School of Medicine; Mie Japan
9. Department of Gastroenterology; Chutoen General Medical Center; Shizuoka Japan