1. Department of Endocrinology, Morbid Obesity, and Preventive Medicine, Oslo University Hospital, Oslo, Norway2Institute of Clinical Medicine, University of Oslo, Oslo, Norway
2. Institute of Clinical Medicine, University of Oslo, Oslo, Norway3Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway4Department of Gastrointestinal Surgery, Oslo University Hospital, Oslo, Norway
3. Department of Endocrinology, Morbid Obesity, and Preventive Medicine, Oslo University Hospital, Oslo, Norway
4. Institute of Clinical Medicine, University of Oslo, Oslo, Norway3Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway
5. Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway
6. Department of Gastrointestinal Surgery, Oslo University Hospital, Oslo, Norway
7. Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway5Department of Health and Nursing Sciences, University of Agder, Grimstad, Norway
8. Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Oslo, Norway
9. Morbid Obesity Center, Vestfold Hospital Trust, Tønsberg, Norway7Department of Gastrointestinal Surgery, Vestfold Hospital Trust, Tønsberg, Norway
10. Department of Endocrinology, Morbid Obesity, and Preventive Medicine, Oslo University Hospital, Oslo, Norway4Department of Gastrointestinal Surgery, Oslo University Hospital, Oslo, Norway