1. Department of Epidemiology and Population Health, Stanford University, Stanford, California;
2. Stanford Cardiovascular Institute, Stanford University, Stanford, California;
3. Center for Innovation in Global Health, Stanford University, Stanford, California;
4. South African Medical Research Council, Cape Town, South Africa;
5. Division of Paediatric Cardiology, Red Cross War Memorial Children’s Hospital, University of Cape Town, Cape Town, South Africa;
6. Cape Heart Institute, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa;
7. Telehealth Center and Cardiology Service, Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil;
8. Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil;
9. Department of Medicine, Stanford University School of Medicine, Stanford, California;
10. Department of Adult and Pediatric Cardiology, Uganda Heart Institute, Kampala, Uganda;
11. Division of Cardiology, Department of Medicine, University of Washington, Seattle, Washington;
12. Department of Global Health, University of Washington, Seattle, Washington