1. Department of Internal Medicine & Clinical Nutrition; Institute of Medicine; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
2. Institute of Health and Care Sciences; Sahlgrenska Academy at the University of Gothenburg; Gothenburg Sweden
3. University of Gothenburg Centre for Person-Centered Care (GPCC); Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
4. Center for Functional GI and Motility Disorders; University of North Carolina at Chapel Hill; Chapel Hill NC USA