1. Obesity Research Group, Department of Clinical and Molecular Medicine, Faculty of Medicine Norwegian University of Science and Technology (NTNU) Trondheim Norway
2. Centre of Obesity and Innovation (ObeCe), Clinic of Surgery St. Olav University Hospital Trondheim Norway
3. Department of Clinical Biochemistry, Rigshospitalet University of Copenhagen Copenhagen Denmark
4. The NovoNordisk Center for Basic Metabolic Research and Department of Biomedical Sciences, The Panum Institute University of Copenhagen Copenhagen Denmark
5. Nord‐Trøndelag Hospital Trust, Clinic of Surgery Namsos Hospital Namsos Norway
6. Department of Public Health Nutrition at the Institute of Basic Medical Sciences, Faculty of Medicine University of Oslo Oslo Norway
7. Department of Nutrition Sciences University of Alabama at Birmingham Birmingham Alabama USA