1. Department of Endocrinology, Obesity and Preventive Medicine; Oslo University Hospital; Oslo Norway
2. Faculty of Medicine; Institute of Clinical Medicine; University of Oslo; Oslo Norway
3. Faculty of Medicine; Institute of Health and Society; Department of General Practice; University of Oslo; Oslo Norway
4. Faculty of Health Sciences; Oslo and Akershus University College of Applied Sciences; Oslo Norway
5. Faculty of Health and Sport Sciences; University of Agder; Kristiansand Norway
6. Norwegian Resource Centre for Women's Health; Department for Women's and Children's Health; Oslo University Hospital; Oslo Norway
7. Department of Biostatistics, Epidemiology and Health Economics; Oslo University Hospital; Oslo Norway