1. Vanderbilt Institute for Global Health (VIGH), Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
2. Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
3. Friends in Global Health (FGH), Maputo, Mozambique.
4. Direcção Provincial de Saúde-Província da Zambézia, Ministério de Saúde, Maputo, Mozambique.
5. Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
6. Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
7. Department of Epidemiology of Microbial Diseases and Office of the Dean, Yale School of Public Health, Yale University, New Haven, Connecticut, USA.