1. From the Facultad de Medicina (C.P.-P.), Universidad de Córdoba, Spain; Department of Neurology (P.A., R.M.E.S., C.E.G., D.G.L.), Johns Hopkins Medicine, Baltimore, MD; Department of Pediatrics and Population Health Sciences (M.L.), Duke University School of Medicine, Durham; Department of Neurology (R.E.S.), Wake Forest University School of Medicine, Winston-Salem, NC; and Kennedy Krieger Institute (D.G.L.), Baltimore, MD.