1. School of Medicine and Dentistry, University of Ghana, P.O. Box 4236, Accra, Ghana
2. Department of Medicine, Korle Bu Teaching Hospital, P.O. Box 77, Accra, Ghana
3. Department of Paediatrics, Faculty of Clinical Sciences, College of Medicine, University of Ibadan, Ibadan PMB 5017, Oyo State, Nigeria
4. Department of Paediatrics, University College Hospital, Ibadan PMB 5116, Oyo State, Nigeria
5. Department of Medicine, General Hospital, Randle Avenue, Apapa PMB 1014, Lagos, Nigeria
6. Cardiology Division, Department of Medicine, University of Port Harcourt Teaching Hospital, Port Harcourt PMB 6173, Rivers State, Nigeria
7. Department of Population Health, NYU School of Medicine, 227 E. 30th Street, 6th Floor, New York, NY 10016, USA
8. Department of Medicine, Faculty of Clinical Sciences, College of Medicine, University of Ibadan, Ibadan PMB 5017, Oyo State, Nigeria
9. Department of Medicine, University College Hospital, Ibadan PMB 5116, Oyo State, Nigeria
10. Global Institute of Public Health, New York University, New York, NY 10003, USA
11. Department of Public Health Sciences, Stritch School of Medicine, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA