1. From the Deparment of Neurology, Johns Hopkins University, Baltimore, MD (D.A., A.E.H.); School of Medicine, University College Dublin, Dublin, Ireland (M.B.G.); and Departments of Radiology (Kumiko Oishi, Kenichi Oishi, A.F.), Neurology (C.D., A.W., E.H.K., R.S., D.C.T., A.E.H.), Otolaryngology (D.C.T.), and PM&R (D.C.T., A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD.