1. Blizard Institute, Queen Mary University of London, London E1 2AT, UK.
2. School of Population and Public Health, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.
3. Joint Clinical Research Centre, Kampala, Uganda.
4. College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe.
5. Royal London Hospital, Barts Health NHS Trust, London E1 1BB, UK.
6. College of Health Sciences, Department of Paediatrics and Child Health, Makerere University, Kampala, Uganda.
7. Uganda Virus Research Institute/MRC Uganda Research Unit on AIDS, Entebbe, Uganda.
8. Baylor College of Medicine Children’s Foundation—Uganda, Mulago Hospital, Kampala, Uganda.
9. Zvitambo Institute for Maternal and Child Health Research, Harare, Zimbabwe.
10. MRC Clinical Trials Unit at University College London, London WC1V 6LJ, UK.
11. UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, UK.
12. Devil’s Staircase Consulting, West Vancouver, British Columbia V7T 1V7, Canada.