Lloyd Tooke1,2, Danielle E Y Ehret3,4, Angela Okolo5, Sithembile Dlamini-Nqeketo6, Yaseen Joolay1,2, Steeve Minto'o7, Shakti Pillay1,2, Yaser Abdallah8,9, Helga Naburi9, Daouda Ndour10, Naana Brobby11, Alexander G Stevenson12,13. 1. Groote Schuur Hospital, Cape Town, South Africa. 2. Department of Paediatrics, University of Cape Town, South Africa. 3. Vermont Oxford Network, Burlington, VT, USA. 4. Department of Pediatrics, Robert Larner MD College of Medicine, University of Vermont, Burlington, VT, USA. 5. Federal Medical Center, Asaba, Nigeria. 6. World Health Organization, Johannesburg, South Africa. 7. Libreville University Hospital Center, Libreville, Gabon. 8. The Agakhan University, Dar es Salaam, Tanzania. 9. Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania. 10. Dalal Jamm National Hospital, Dakar, Senegal. 11. Department of Child Health, School of Medicine and Dentisty, KNUST, Kumasi, Ghana. 12. Mbuya Nehanda Maternity Hospital, Harare, Zimbabwe. 13. Department of Paediatrics, University of Zimbabwe, Harare, Zimbabwe.