1. Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, Georgia
2. Department of Epidemiology, School of Public Health, University of Alabama at Birmingham
3. London School of Hygiene and Tropical Medicine, UK
4. Division of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
5. National Institute of Neurological Disorders and Stroke, Bethesda, Maryland