1. Department of Pediatrics, Alpert Medical School of Brown University, Providence, Rhode Island, USA
2. Center for International Health Research, Rhode Island Hospital, Providence, Rhode Island, USA
3. Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts, USA
4. Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, USA
5. Department of Infectious Diseases, Imperial College London, London, United Kingdom
6. Department of Paediatrics and Child Health, Stellenbosch University, Cape Town, South Africa
7. Division of Global Health Equity, Brigham and Women’s Hospital, Boston, Massachusetts, USA