1. From Wake Forest University School of Medicine, Division of Public Health Sciences (L.W.), Winston-Salem, NC; Department of Radiology, Division of Neuroradiology (B.W.) and Departments of Epidemiology, Biostatistics and Medicine (J.C., R.S.), Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Md; Department of Biostatistics (L.C.), University of North Carolina, Chapel Hill, NC; Division of Epidemiology and Community Health (A.F.), University of Minnesota School of Public Health,...