1. Athena Institute, Vrije Universiteit, Amsterdam, Netherlands
2. Institute of Tropical Medicine, Department of Public Health, Maternal and Reproductive Health Unit, Antwerp, Belgium
3. ISGlobal, Barcelona Centre for International Health Research (CRESIB), Spain
4. Institute of Tropical Medicine, Department of Public Health, Health Systems Unit, Antwerp, Belgium
5. Royal Tropical Institute, Amsterdam, Netherlands