1. Department of Medicine and Therapeutics, University of Ghana Medical School, University of Ghana, Accra, Ghana
2. Department of Physiology, University of Ghana Medical School, University of Ghana, Accra, Ghana
3. Department of Cardiology, University of Ghana Medical Centre, Accra, Ghana
4. Korle-Bu Teaching Hospital, Accra, Ghana
5. Emerging Pathogens Institute, University of Florida, 2055 Mowry Road, P.O. Box 100009, Gainesville, FL 2610, USA
6. Department of Medicine, Division of Infectious Diseases and Global Medicine, College of Medicine, University of Florida, College of Medicine, Gainesville, FL 32610, USA