1. Department of Psychological and Brain Sciences, The George Washington University, Washington, DC;
2. Department of Neuroscience, American University, Washington, DC;
3. Department of Prevention and Community Health, The George Washington University, Washington, DC;
4. Department of Physiology and Biophysics, College of Medicine, Howard University, Washington, DC;
5. Department of Epidemiology, The George Washington University, Washington, DC;
6. Department of Sociology, American University, Washington, DC; and
7. Office of the Provost, Howard University, Washington, DC.