1. Department of Internal Medicine, College of Medicine Taibah University Madinah Saudi Arabia
2. Medicine Department Prince Mohammed Bin Abdul‐Aziz Hospital‐National Guard Hospital Madinah Saudi Arabia
3. King Abdullah International Medical Research Center King Saud bin Abdulaziz University for Health Sciences, Pathology and Laboratory Medicine, King Abdulaziz Medical City Jeddah Saudi Arabia
4. Department of Neurosurgery Cairo University Cairo Egypt
5. Central Military Laboratory and Blood Bank Prince Sultan Military Medical City Riyadh Saudi Arabia