1. Clinical Epidemiology Division Department of Medicine Karolinska Institutet Stockholm Sweden
2. Department of Obstetrics and Gynecology Visby County Hospital Visby Sweden
3. Department of Environmental and Life Sciences Faculty of Health, Science and Technology GeomaticsKarlstad University Karlstad Sweden
4. Department of Women’s Health Karolinska University Hospital Stockholm Sweden
5. Department of Clinical Science, Intervention and Technology Division of Pediatrics Karolinska Institutet Stockholm Sweden
6. Department of Neonatal Medicine Karolinska University Hospital Stockholm Sweden