1. Neuroscience Center King Faisal Specialist Hospital and Research Center Riyadh Saudi Arabia
2. Department of Biostatistics, Epidemiology, and Scientific Computing King Faisal Specialist Hospital and Research Centre Riyadh Saudi Arabia
3. Department of Radiology King Faisal Specialist Hospital and Research Centre Riyadh Saudi Arabia
4. Alfaisal University Riyadh Saudi Arabia
5. Department of Clinical Neurosciences and Department of Radiology Cumming School of Medicine University of Calgary Calgary Canada
6. Department of Medicine University of Alberta Edmonton Alberta Canada