| Affiliation: | 1. Department of Child and Adolescents Medicine, Akershus University Hospital, , L?renskog, Norway;2. Institute of Clinical Medicine, University of Oslo, , Oslo, Norway;3. Norwegian Resource Centre for Women's Health, Oslo University Hospital, , Oslo, Norway;4. Department of General Practice, Institute of Health and Society, University of Oslo, , Oslo, Norway;5. Faculty of Health, Oslo and Akershus University College of Applied Sciences, , Oslo, Norway;6. Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, , Oslo, Norway;7. Unit of Biostatistics and Epidemiology, Oslo University Hospital, , Oslo, Norway |
