1. From the Departments of Pathology (Drs Covin, Brimhall, Reiquam, and Shroyer), Medicine (Dr Shroyer), and Preventive Medicine and Biometrics (Dr Grunwald), University of Colorado Health Sciences Center School of Medicine, and the Departments of Cardiac Research (Drs O'Brien and Shroyer) and Pathology (Dr Rajagopalan), Denver Veterans Affairs Medical Center, Denver, Colo; the Department of Cardiot