1. Bandim Health Project, INDEPTH Network, Bissau, Guinea-Bissau
2. Bandim Health Project, Research Unit OPEN, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
3. Institute for International Programs, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
4. Department of Sociology, The Ohio State University, Columbus, Ohio, USA
5. Institute for Population Research, The Ohio State University, Columbus, Ohio, USA
6. Population, Family, and Reproductive Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA