1. From the Division of Neurology (Drs. Al Rajeh and Awada), King Saud University & King Fahad National Guard Hospital, Riyadh; Departments of Neurology (Drs. Bademosi and Ismail), Internal Medicine (Dr. Al-Freihi), Pediatrics (Dr. Dawodu) and Family & Community Medicine (Drs. Chebib and Assuhaimi) King Faisal University, Dammam