1. Tishreen Military Hospital Neurology Department, , Damascus, Syria
2. Syrian Private University Faculty of Medicine, , Damascus, Syria
3. Damascus University Internal Medicine Department, , Damascus, Syria
4. Damascus University Faculty of Medicine, , Damascus, Syria
5. Al Mouwasat University Hospital Pathology Department, , Damascus, Syria
6. Al Mouwasat University Hospital, Damascus University Ophthalmology Department, , Damascus, Syria