1. Gastro Unit, Medical Division, Copenhagen University Hospital, Hvidovre, Denmark
2. Department of Internal Medicine B, University of Münster, Münster, Germany
3. Novo Nordisk Foundation Centre for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
4. Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
5. Department of Hepatology and Gastroenterology, Aarhus University Hospital, and Clinical Institute, Aarhus University, Aarhus, Denmark
6. Department of Gastroenterology and Hepatology, Copenhagen University Hospital, Herlev, Denmark
7. Department of Clinical Physiology and Nuclear Medicine, Centre of Functional Imaging and Research, Copenhagen University Hospital, Hvidovre, Denmark