1. Department of Coloproctology, JCHO Tokyo Yamate Medical Center , Shinjuku, Tokyo , Japan
2. Department of Therapeutics for Inflammatory Bowel Diseases, Osaka University Graduate School of Medicine , Suita, Osaka , Japan
3. Takeda Development Center, Takeda Pharmaceutical Company Limited , Osaka , Japan
4. Center for Inflammatory Bowel Disease, Division of Internal Medicine, Hyogo College of Medicine , Nishinomiya, Hyogo , Japan
5. Department of Surgery, Center for Clinical Medical Research, Fukuoka University Chikushi Hospital , Chikushino, Fukuoka , Japan