University of Amsterdam - Department of Gastroenterology and Hepatology, St. Antonius Hospital - Department of Gastroenterology and Hepatology, KU Leuven - Department of Gastroenterology and Hepatology, KU Leuven - Department of Gastroenterology and Hepatology, St. Antonius Hospital - Department of Gastroenterology and Hepatology, St. Antonius Hospital - Department of Gastroenterology and Hepatology, Utrecht University - Department of Gastroenterology and Hepatology, Isala Kliniek - Department of Gastroenterology and Hepatology, Isala Kliniek - Department of Gastroenterology and Hepatology, Catharina Hospital - Department of Gastroenterology and Hepatology, Catharina Hospital - Department of Gastroenterology and Hepatology, Erasmus University Rotterdam (EUR) - Department of Gastroenterology & Hepatology, Erasmus University Rotterdam (EUR) - Department of Gastroenterology & Hepatology, IJsselland Hospital - Department of Gastroenterology and Hepatology, University of Groningen - Department of Gastroenterology and Hepatology, University of Groningen - Department of Gastroenterology and Hepatology, Haga Hospital - Department of Gastroenterology and Hepatology, Hirslanden Private Hospital Group - Centre of Gastroenterology, Utrecht University - Julius Center for Health Sciences and Primary Care, University of Amsterdam - Department of Gastroenterology and Hepatology and University of Amsterdam - Department of Gastroenterology and Hepatology