1 Department of Radiology, Shohada Tajrish Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. zare@sbmu.ac.ir.
2 Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
3 Department of Radiology, Mahdieh Women's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.