1. Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;
2. School of Behavioural, Social and Legal Sciences, University of Örebro, Sweden;
3. INSERM UMR 1073, Institute for Research and Innovation in Biomedicine, Normandy University, Rouen, France;
4. Rouen University Hospital, Gastroenterology Department and INSERM CIC-CRB 1404, Rouen, France;
5. Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases and Metabolism (CHROMETA), KU Leuven, Leuven, Belgium;
6. Center for Functional GI and Motility Disorders, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, USA;
7. Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada;
8. Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada;
9. Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.