1. Nutritional Laboratory, Department of Medical Biochemistry, Clinic of Laboratory Medicine, Oslo University Hospital Aker; University of Oslo, Oslo, Norway;
2. Department of Radiology, Medical Clinic, Oslo University Hospital Aker, Norway;
3. Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital Aker; University of Oslo, Oslo, Norway;
4. Department of Pediatrics, Oslo University Hospital Ullevål; University of Oslo, Oslo, Norway