1. Division of Gastroenterology, Hospital Beatriz Ângelo, Loures, Portugal
2. Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
3. Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
4. Department of Gastroenterology, Hospital de Galdakao, and Biocruces Bizkaia Health Research Institute, Bilbao, Spain
5. Karolinska Institutet, Department of Medicine Solna, Stockholm, Sweden
6. Karolinska University Hospital, Gastroenterology unit, Department of Gastroenterology, Dermatovenereology and Rheumatology, Stockholm, Sweden
7. Department of Epidemiology Research, Statens Serum Institut, Copenhagen S, Denmark
8. PREDICT, Institute of Clinical Medicine, Aalborg University, Aalborg, Denmark
9. Division of Pediatric Gastroenterology and Nutrition, Susan and Leonard Feinstein Inflammatory Bowel Disease Clinical Center, Icahn School of Medicine Mount Sinai, New York, NY, USA
10. Center for Inflammatory Bowel Disease, Mount Sinai Hospital, Toronto, ON, Canada
11. Division of Gastroenterology and Hepatology, University of Toronto, Toronto, ON, Canada
12. Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA