1. Gastro UnitMedical Division, Copenhagen University HospitalHvidovre Denmark
2. Centre of Functional Imaging and ResearchDepartment of Clinical Physiology and Nuclear Medicine, Copenhagen University HospitalHvidovre Denmark
3. Department of Gastroenterology and HepatologyCopenhagen University HospitalBispebjerg Denmark
4. Department of Gastroenterology and HepatologyOdense University Hospital, and Institute of Clinical ResearchUniversity of Southern Denmark Odense Denmark