1. Department of Gastroenterology, Henri-Mondor University Hospital, AP-HP , EA7375, Universite Paris Est Creteil, F-94010 Creteil , France
2. Department of Gastroenterology, CHU UCL Namur , 1 Av Dr Therasse, 5530 Yvoir , Belgium
3. Division of Gastroenterology, AZ Delta , Roeselare , Belgium
4. Department of Gastroenterology , Montfermeil , France
5. IBD Unit, St Mark’s Hospital and Academic Institute , Harrow , UK
6. Gastroenterology Department , Evangelismos-Polykliniki General Hospitals of Athens, Athens , Greece
7. IBD Unit, Department of Systems Medicine, University ‘Tor Vergata’ of Rome , Via Montpellier, Rome , Italy
8. Department of Gastroenterology, Hospital Universitari Germans Trias i Pujol, Badalona and Centro de Investigación Biomédicas en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD) , Madrid , Spain
9. Hepato-Gastroenterology and Digestive Oncology, University Hospital CHU of Liège , Liège , Belgium
10. Department of Gastroenterology, Nancy University Hospital, and Inserm U1256 NGERE, Lorraine University , Vandoeuvre-les-Nancy , France
11. Department of Gastroenterology, Sorbonne Université, INSERM, Institut Pierre Louis d’Epidémiologie et de Santé Publique, AP-HP, Saint-Antoine University Hospital , Paris , France
12. Gastrounit, medical division, Hvidovre Hospital, University of Copenhagen , Hvidovre , Denmark