1. From the Division of Neurocritical Care and Emergency Neurology, Department of Neurology, Yale University School of Medicine, New Haven, CT (S.U., L.A.B., D.W.G., K.N.S.); Center for Human Genetic Research, Division of Neurocritical Care and Emergency Neurology, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (A.V., A.M.A., T.W.K.B., W.T.K., J.R.); and Stroke Division, Department of Neurology, Beth Israel Deaconess Medical Center, Boston, MA (M.H.S.).