From the Department of Biostatistics (G.H., L.A.M., J.D.R., S.E.J.) and Department of Epidemiology (V.J.H.), School of Public Health, and Deep South Center on Effectiveness at the Birmingham Veterans Affairs Medical Center and the Division of Preventive Medicine, Department of Medicine (M.M.S.), University of Alabama at Birmingham, Birmingham, AL; Department of Medicine (M.C.), University of Vermont College of Medicine, Burlington, VT; Department of Neurology (B.M.K., D.O.K.), University of... (At 2011-12)