1. Center for Preventive Medicine, Keio University Hospital, Tokyo, Japan.
2. Department of Gastroenterology, Kitasato University Hospital, Kanagawa, Japan.
3. Division of Gastroenterology & Hepatology, Department of Internal Medicine, Keio University School of Medicine, Fukuoka, Japan.
4. IBD Center, Fukuoka University Chikushi Hospital, Fukuoka, Japan.
5. AbbVie GK, Tokyo, Japan.
6. AbbVie Inc., North Chicago, IL, USA.
7. Center for Advanced IBD Research and Treatment, Kitasato Institute Hospital, Kitasato University, Tokyo, Japan.