1. Gastroenterology Department, General University Hospital of Alicante and Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Carlos III Health Institute, Madrid, Spain
2. Gastroenterology Department, Marques de Valdecilla General University Hospital, Santander, Spain
3. Gastroenterology Department, La Paz General University Hospital, Instituto de Investigación Biomédica La Paz (IdiPaz), Madrid, Spain
4. Clinical Management of Gastrointestinal Tract Diseases Unit, Reina Sofia University Hospital, Maimonides Institute of Biomedical Research of Cordoba (IMIBIC), Cordoba University, Cordoba, Spain
5. Gastroenterology Department, Valme University Hospital, Sevilla, Spain
6. Gastroenterology Department, University Hospital, Río Hortega, Valladolid, Spain
7. Gastroenterology Department, University Hospital Central de Asturias, Oviedo, Spain
8. Gastroenterology Department, Inflammatory Bowel Disease Unit, University Hospital Complex of Santiago de Compostela, Santiago de Compostela, Spain
9. Medical Department, Merck Sharp and Dohme, Madrid, Spain
10. Crohn-Colitis Care Unit (UACC), Digestive Tract Service, Hospital Universitari Vall d'Hebron, Barcelona, Spain
11. Gastroenterology Department, Germans Trias i Pujol University Hospital and CIBERehd, Badalona, Spain