1. Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN 37203, USA
2. Vanderbilt Institute for Global Health, Vanderbilt University Medical Center, Nashville, TN 37203, USA
3. Department of Microbiology, Faculty of Medicine, University Eduardo Mondlane, Maputo, Mozambique
4. Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN 37203, USA
5. General Hospital Quelimane, Quelimane, Mozambique
6. General Hospital José Macamo, Maputo, Mozambique