1. Vanderbilt Institute for Global Health, Vanderbilt University School of Medicine, Nashville, Tennessee.
2. Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee.
3. Friends in Global Health, Quelimane and Maputo, Mozambique.
4. Department of Preventive Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee.
5. Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee.