1. Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany
2. Department of Economics and Centre for Modern Indian Studies, University of Goettingen, Göttingen, Germany
3. UNICEF, Regional Office for West and Central Africa, Dakar, Senegal
4. UNICEF Area Representative for Gabon and São Tomé and Príncipe and to the ECCAS, Libreville, Gabon