1. Department of Health, Human Performance and Leisure Studies, and the Cancer Center Physical Medicine and Nutrition Laboratory, Howard University, Washington, DC 20059, USA
2. Division of Cardiology, Department of Internal Medicine, Howard University College of Medicine and Howard University Hospital, Washington, DC 20060, USA
3. Department of Neurology, Howard University College of Medicine and Howard University Hospital, Washington, DC 20060, USA
4. Department of Physics and Astronomy, Howard University, Washington, DC 20059, USA
5. Department of Physiology & Biophysics, Howard University College of Medicine, Washington, DC 20059, USA