1. Faculty of Medicine, Beirut Arab University, Beirut, Lebanon
2. Saint Jean Hospital, Brussels, Belgium
3. Department of Neurology, American University of Beirut Medical Center, Beirut, Lebanon
4. Department of Infectious Diseases, Saint George Hospital University Medical Center, Beirut, Lebanon
5. Department of Research, Makassed General Hospital, Beirut, Lebanon
6. Department of Neurology, Makassed General Hospital, Beirut, Lebanon