From the Departments of Neurology (S.M., C.L., K.G., K.J.), Anesthesiology/Critical Care (S.M.), Surgery (S.M.), Population and Quantitative Health Sciences (J.F., R.G.), Meyers Primary Care Institute (K.M.M.), and Internal Medicine (K.M.M.), University of Massachusetts Medical School, Worcester; Center for Neuroepidemiology and Clinical Neurological Research (D.Y.H.) and Department of Neurology (D.Y.H., J.J.P., A.K.K.), Yale School of Medicine, New Haven, CT; Department of Medicine (T.Q.), Beth Israel Deaconess Hospital, Harvard Medical School, Boston, MA; Department of Psychiatry (J.M.), Brown Medical School, Providence, RI; and Departments of Critical Care Medicine and Neurology (L.S.), University of Pittsburgh School of Medicine, PA.