1. Athena Institute, VU Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
2. Sexual and Reproductive Health Group, Department of Public Health, Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium
3. Faculty of Epidemiology and Population Health, LSHTM, Keppel Street, London WC1E 7HT, UK
4. Karolinska Institutet, 171 77 Stockholm, Sweden
5. Faculty of Infectious and Tropical Diseases, LSHTM, Keppel Street, London WC1E 7HT, UK
6. Doctors with Africa-CUAMM, Av. Mártires da Machava n.º 859 R/C, Cidade de Maputo, Moçambique
7. Department of Obstetrics and Gynecology, Muhimbili University of Helath and Allied Sciences, PO Box 65001, Dar es Salaam, United Republic of Tanzania
8. Department of Public Health, Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium
9. Department of obstetrics and Gynecology, Leiden University Medical Center, Rapenburg 70, 2311 EZ Leiden, The Netherlands