1 Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
2 Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases, Metabolism, and Ageing (CHROMETA), University of Leuven, Leuven, Belgium.
3 Center for Functional GI and Motility Disorders, University of North Carolina, Chapel Hill, NC, USA.