1. Division of Vascular and Endoovascular Neurosurgery, Firoozgar Hospital, Faculty of medicine, Iran University of Medical Sciences, Tehran, Iran
2. Department of Radiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
3. Department of Neurosurgery, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
4. Akbar Clinical research and Development Unit, Mashhad University of Medical Sciences, Mashhad, Iran