1. Center for Morbid Obesity, Department of Surgery, Innlandet Hospital Trust, Gjøvik, Norway
2. Department of Food Safety and Infection Biology, Norwegian University of Life Sciences (NMBU), Campus Adamstuen, Oslo, Norway
3. Innlandet Hospital Trust, Kongsvinger Hospital Division, Kongsvinger, Norway
4. Faculty of Public Health, Hedmark University of Applied Sciences, Elverum, Norway