1. Department of Internal Medicine and Clinical Nutrition; Sahlgrenska University Hospital; Göteborg Sweden
2. Department of Molecular and Clinical Medicine; Sahlgrenska Academy at Göteborg University; Göteborg Sweden
3. Department of Microbiology and Immunology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
4. Danone Nutricia Research; Palaiseau France
5. Department of Mathematical Sciences; Chalmers University of Technology and Göteborg University; Göteborg Sweden
6. Center for Functional Gastrointestinal and Motility Disorders; University of North Carolina at Chapel Hill; Chapel Hill NC USA