1. Department of Midwifery; Faculty of Nursing; University of Iceland; Reykjavík Iceland
2. Faculty of Medicince; University of Iceland; Reykjavík Iceland
3. Department of Obstetric and Gynecology; Women’s Clinic; Landspitali University Hospital; Reykjavík Iceland
4. Faculty of Medicine; Centre of Public Health Sciences; University of Iceland; Reykjavík Iceland
5. Faculty of Medicine; Centre for Big Data Research in Health; University of New South Wales; Sydney NSW Australia