1. From the Faculty of Medicine, Al-Azhar University, Cairo, Egypt
2. Faculty of Medicine, October 6 University, Giza, Egypt
3. Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA
4. Department of Neurology, University of Texas Houston McGovern Medical School, Houston, TX
5. Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE
6. Faculty of Pharmacy, Al-Azhar University - Gaza, Gaza Strip, Palestine
7. Faculty of Pharmacy, Kafr El-Shaikh University, Kafr El-Shaikh, Egypt
8. Faculty of Medicine, Al-Azhar University, Damietta, Egypt
9. Faculty of Medicine, Minia University, Minia, Egypt
10. Faculty of Medicine, Al-Azhar University, Assiut, Egypt
11. Department of Neurology, Westchester Medical Center, Valhalla, NY
12. Department of Neurology, Weill Cornell Medical College, New York, NY
13. Department of Neurology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA
14. Departments of Neurology and Neurosurgery, New York Medical College at Westchester Medical Center, Valhalla, NY.