1. UTHealth Department of Neurology, McGovern Medical School and Institute for Stroke and Cerebrovascular Disease, Houston, TX (S.A.S., T.C.W., A.S., C.A., S.I.S.).
2. Mobile Stroke Unit, Memorial Hermann Hospital, Houston, TX (J.C.G.).
3. Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA (M.F.).