1. Cardiology Unit, Department of Medicine, University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria.
2. Nephrology Unit, Department of Medicine, University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria.
3. Department of Medicine, University of Abuja Teaching Hospital, Gwagwalada, Abuja.
4. Hatter Institute of Cardiovascular Medicine, Faculty of Medicine, University of Cape Town, South Africa.