1. From the Departments of Neurosurgery (M.Z., J.T., H. Van L., H-S.Y.), Neurology (L.S., J.B.), Emergency Medicine (R.K., A.P.), Radiology (T.T.), and Environmental Health (J.K.), University of Cincinnati Medical Center (Ohio); Department of Neurology, Mayo Clinic, Jacksonville, Fla (T.B.); and Service de Neurologie, Hopitaux de Lyon, Lyon, France (L.D.).