Asma Mohammaddin1,2, Muhamad Almahayni3, Ahmed Alkhani1,2,4
1School of Medicine, Alfaisal University; 2Department of Neurosurgery, 3Department of Adult Hematology and Bone Marrow Transplant, Oncology, King Faisal Specialist Hospital and Research Center; 4Department of Neurosurgery, King Abdulaziz Medical city, National Guard Health Affairs, Riyadh, Saudi Arabia.