1. Department of Paediatrics, University of Zambia, School of Medicine, Lusaka, Zambia
2. Department of Medicine, Division of Clinical Pharmacology, University of Cape Town, Faculty of Health Sciences, Cape Town, South Africa
3. University Teaching Hospital-Children’s Hospital, Lusaka, Zambia
4. Medical Research Council–Clinical Trials Unit at University College London, Institute of Clinical Trials and Methodology, London, United Kingdom
5. Wellcome Centre for Infectious Diseases Research in Africa (CIDRI-Africa), Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.