1. Department of Health Sciences, Global Health Unit, University Medical Centre Groningen, Groningen, the Netherlands
2. Faculty of Spatial Sciences, Population Research Centre, University of Groningen, Groningen, the Netherlands
3. Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
4. Max Planck Institute for Demographic Research, Rostock, Germany
5. Sociology Department, University of Amsterdam, Amsterdam, the Netherlands
6. Jhpiego – An Affiliate of Johns Hopkins University, Jhpiego, New Delhi, India
7. Department of Obstetrics and Gynaecology, Medical Centre Leeuwarden, Leeuwarden, the Netherlands