1. Midwifery Science Amsterdam University Medical Centre, Vrije Universiteit Amsterdam Amsterdam The Netherlands
2. Midwifery Academy Amsterdam Groningen, InHolland Amsterdam The Netherlands
3. Amsterdam Public Health, Quality of Care Amsterdam The Netherlands
4. Department of General Practice & Elderly Care Medicine, University Medical Centre Groningen University of Groningen Groningen The Netherlands
5. Center for Bioethics and Social Sciences in Medicine University of Michigan Ann Arbor Michigan USA
6. Midwifery Academy Maastricht Zuyd University Maastricht The Netherlands
7. School for Public Health and Primary Care (CAPHRI) Maastricht University Maastricht The Netherlands
8. Boston University School of Public Health Boston Massachusetts USA