1. Case Western Reserve University/MetroHealth Medical Center Campus; Department of internal medicine; Cleveland OH USA
2. Wayne State University; Neurology Department; 4640 cass ave Apt 202 Detroit MI USA 48201
3. Damascus University-Medical College; Faculty of Medicine; Damascus Syrian Arab Republic
4. Heart Group; London UK
5. Damascus Syrian Arab Republic
6. Modern Psychiatry Hospital; Psychiatry Centre; 27 Al Zahrawi Street Rawda Damascus Syrian Arab Republic
7. The Golden Cardiovascular Centre; P.O. Box 6891 Damascus Syrian Arab Republic