1. Department of Gastroenterology and Hepatology, Leiden University Medical Centre, Leiden, The Netherlands
2. Amsterdam UMC, University of Amsterdam, Department of Gastroenterology and Hepatology, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM) Research Institute, Amsterdam, The Netherlands
3. Department of Biomedical Data Sciences, section Medical Decision Making, Leiden University Medical Center, Leiden, The Netherlands
4. Crohn & Colitis NL, Woerden, The Netherlands
5. Radboudumc, Department of Gastroenterology and Hepatology, Nijmegen, The Netherlands