1. Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa (T.M., C.C., G.S., L.J.Z., B.M., S.P.; J.d.V., N.L., A.J., R.D., M.N., M.E.E.).
2. Department of Medicine, Cape Heart Institute, University of Cape Town, Cape Town, South Africa (T.M., G.S., L.J.Z., B.M., M.E.E.).
3. Population Health Research Institute, Hamilton, ON, Canada (T.M., B.M., M.C., G.P.).
4. Thrombosis and Atherosclerosis Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, ON, Canada (T.M., B.M., M.C., G.P.).
5. Department of Pathology and Molecular Medicine, Michael G. DeGroote School of Medicine, Hamilton, ON, Canada (T.M., B.M., M.C., G.P.).
6. Division of Cardiology, University of KwaZulu-Natal, Msunduzi, KwaZulu-Natal (C.C.).
7. Division of Pediatric Cardiology, Department of Pediatrics and Child Health, Red Cross War Memorial Children’s Hospital, Cape Town, South Africa (L.J.Z.).
8. South African Medical Research Council, Extramural Research and Internal Portfolio, Cape Town, South Africa (L.J.Z.).
9. Rheumatic Heart Disease Clinic, Windhoek Central Hospital, Ministry of Health and Social Services, Windhoek, Republic of Namibia (C.T.H.-H.).
10. Cardiology Department of Medicine, Kenyatta National Hospital, University of Nairobi, Nairobi, Kenya (B.G.).
11. Uganda Heart Inst, Departments of Adult and Pediatric Cardiology, Kampala, Uganda (S.O.).
12. School of Medicine, Maseno Univ, Kenya (P.L., E.O.).
13. Faculty of Medicine, Eduardo Mondlane Univ/Nucleo de Investigaçao, Departamento de Medicina, Hospital Central de Maputo, Maputo, Mozambique (A.D., C.N.).
14. Instituto Nacional de Saúde Ministério da Saúde, Mozambique (A.O.M.).
15. WHO Mozambique, Maputo, Mozambique (G.M.).
16. University Teaching Hospital, Children’s Hospital, University of Zambia, Lusaka, Zambia (J.M., A.M.).
17. Department of Cardiothoracic Surgery, Alshaab Teaching Hospital, Alazhari Health Research Centre, Alzaiem Alazhari University, Khartoum, Sudan (A.E., H.H.M.A.).
18. Deptartments of Pediatrics and Medicine, Jos University Teaching Hospital and University of Jos, Jos, Plateau State, Nigeria (F.B.-T., C.Y., G.A., E.N.).
19. Computational Biology Division, Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences (N.M.), University of Cape Town, Cape Town, South Africa.
20. Department of Pathology (R.R.), University of Cape Town, Cape Town, South Africa.
21. Division of Epidemiology and Biostatistics, School of Public Health and Family Medicine (M.L.), University of Cape Town, Cape Town, South Africa.
22. Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Newcastle upon Tyne, UK (H.J.C.).
23. Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, UK (B.K.).
24. Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, UK (B.K.).
25. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada (G.P.).