1. From the Department of Internal and Vascular Medicine Academic Medical Center Amsterdam the Netherlands
2. Department of Surgery Spaarne Hospital Hoofddorp the Netherlands
3. Wallenberg Laboratory Department of Molecular and Clinical Medicine Sahlgrenska AcademyGoteborgs Universitet Gothenburg Sweden
4. Novo Nordisk Foundation Center for Basic Metabolic Research Section for Metabolic Receptology and Enteroendocrinology Faculty of Health Sciences University of Copenhagen Copenhagen Denmark
5. Department of Clinical Physiology Region Västtra GötalandSahlgrenska University Hospital Gothenburg Sweden