1. Department of Epidemiology, University of North Carolina School of Public Health
Chapel Hill, NC.
2. Division of Epidemiology and Clinical Applications, National Heart, Lung, and Blood Institute
Bethesda, MD.
3. ARIC Ultrasound Reading Center
Winston-Salem, NC.
4. Department of Biostatstics, University of North Carolina School of Public Health
Chapel Hill, NC.
5. Department of Epidemiology, The Johns Hopkins School of Hygiene and Public Health
Baltimore, MD.