1. Division of Gastroenterology; Department of Internal Medicine; Hyogo College of Medicine; Hyogo Okayama Japan
2. Division of Gastroenterology; Department of Internal Medicine; Kawasaki Medical School; Kurashiki City Okayama Japan
3. Department of Pharmacovigilance; Takeda Pharmaceutical Company Limited; Osaka Osaka Japan
4. Department of Gastroenterology and Hepatology; Shimane University School of Medicine; Izumo Shimane Japan