1 From Neurology and Emergency Medicine (H.E.H.), Oregon Health & Science University, Portland; and Department of Neurology (N.R.G.), University of Texas Health Science Center at Houston. hinson@ohsu.edu.
2 From Neurology and Emergency Medicine (H.E.H.), Oregon Health & Science University, Portland; and Department of Neurology (N.R.G.), University of Texas Health Science Center at Houston.