1. From the Department of Medicine, Division of Cardiology (Y.Y.I., B.A., N.M., G.J.V., Y.O., R.K.S., J.A.C.L., H.A.), Department of Radiology (B.A., C.Y.L., D.A.B., J.A.C.L.), and Department of Biomedical Engineering (H.A.), Johns Hopkins University School of Medicine, 600 N Wolfe St, Carnegie 568, Baltimore, MD 21287; Office of Biostatistics Research, National Heart, Lung and Blood Institute, Bethesda, Md (C.O.W...