1. Department of Midwifery Faculty of Nursing University of Iceland Reykjavík Iceland
2. Research Centre for Midwifery Science Academie Verloskunde Maastricht Zuyd The Netherlands
3. CAPHRI School for Public Health and Primary Care Maastricht University Maastricht The Netherlands
4. Faculty of Medicine Centre of Public Health Sciences University of Iceland Reykjavík Iceland
5. Department of Obstetrics and Gynecology Women's Clinic Landspítali University Hospital Reykjavík Iceland