1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Center for Learning and Child Development, Accra, Ghana
2. Center for Learning and Child Development, Accra, Ghana; Department of Public and Environmental Wellness, Oakland University, Rochester, Michigan, USA
3. Center for Learning and Child Development, Accra, Ghana
4. Center for Learning and Child Development, Accra, Ghana; School of Public Health, University of Ghana, Legon, Accra, Ghana
5. Center for Learning and Child Development, Accra, Ghana; Department of Epidemiology and Biostatistics, University of South Carolina, Columbia, South Carolina, USA