1. Gastroenterologist, Inflammatory Bowel Disease Unit, “Villa Sofia-Cervello” Hospital, Strasburgo 233, 90146 Palermo, Italy
2. Gastroenterologist, Department of Gastroenterology, University Hospital Southampton, and University of Southampton, Tremona Road, Southampton, Hampshire SO16 6YD, UK
3. Gastroenterologist, Department of Medicine, Medical Clinic 1, University Hospital Erlangen, University of Erlangen-Nürnberg Erlangen, Ulmenweg 18, 91054 Erlangen, Germany
4. Manager Medical Affairs Group, Samsung Bioepis, 76, Songdogyoyuk-ro, Yeonsu-gu, Incheon, Republic of Korea