1. Department of Gastroenterology Vall d'Hebron Hospital Universitari Vall d'Hebron Barcelona Hospital Campus Barcelona Spain
2. Department of Gastroenterology Lozano Blesa University Clinical Hospital Zaragoza Spain
3. Department of Liver and Gastrointestinal Diseases, Biodonostia Health Research Institute, Donostia University Hospital University of the Basque Country (UPV/EHU) San Sebastian Spain
4. The Faculty of Health Sciences Ben‐Gurion University of the Negev Beer‐Sheva Israel
5. Center for Functional GI & Motility Disorders University of North Carolina‐Chapel Hill North Carolina Chapel Hill USA
6. Population Health Research Institute McMaster University Ontario Hamilton Canada
7. Department of Health Research Methods, Evidence and Impact McMaster University Ontario Hamilton Canada
8. Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERHED) Instituto de Salud Carlos III Madrid Spain
9. Department of Gastroenterology University of the Basque Country UPV/EHU San Sebastian Spain
10. Laboratory of Neuro‐Immuno‐Gastroenterology, Digestive System Research Unit Vall d'Hebron Institut de Recerca (VHIR) Barcelona Spain
11. Facultad de Medicina Universitat Autònoma de Barcelona Barcelona Spain
12. Department of genetics, microbiology and statistics University of Barcelona Barcelona Spain
13. Statistics and Bioinformatics Unit Vall d'Hebron Institute of Research (VHIR) Barcelona Spain