1. Optum, Johnston, RI, USA
2. University of Chicago Medicine, Inflammatory Bowel Disease Center, Chicago, IL, USA
3. Hospital Clínic de Barcelona, IDIBAPS, CIBERehd, Barcelona, Spain
4. Centre for Immunobiology, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
5. Department of Gastroenterology, University Hospitals Leuven, Leuven, Belgium
6. Pfizer Inc, Groton, CT, USA
7. New York University School of Medicine, New York, NY, USA
8. Pfizer Inc, New York, NY, USA