1 From the Departments of Neurology (L.A.B.), Pediatrics (L.A.B.), and Radiology (A.V.), Perelman School of Medicine at the University of Pennsylvania; and Divisions of Neurology (L.A.B.) and Neuroradiology (A.V.), Children's Hospital of Philadelphia, PA. beslow@chop.edu.
2 From the Departments of Neurology (L.A.B.), Pediatrics (L.A.B.), and Radiology (A.V.), Perelman School of Medicine at the University of Pennsylvania; and Divisions of Neurology (L.A.B.) and Neuroradiology (A.V.), Children's Hospital of Philadelphia, PA.