2 Department of Statistics Hacettepe University Faculty of Medicine Ankara, Turkey.
3 Department of Neurology and Psychiatry University of Alexandria Alexandria, Egypt Department of Neurology Johns Hopkins School of Medicine Baltimore, Maryland.
4 Department of Neurology Johns Hopkins School of Medicine Baltimore, Maryland Department of Neurology Massachusetts General Hospital and Harvard Medical School Boston, Massachusetts.
5 Edward B. Singleton Chair of Radiology Texas Children's Hospital Houston, Texas.
6 Section of Pediatric Neuroradiology, Division of Neuroradiology The Russell H. Morgan Department of Radiology and Radiological Science Johns Hopkins School of Medicine Baltimore, Maryland.