1. Neurogenetics Program and Division of Pediatric Neurology; Departments of Pediatric and Adolescent Medicine; Biochemistry and Molecular Genetics; American University of Beirut; Beirut; Lebanon
2. Department of Pediatrics; Duke University Medical Center; Durham; NC; USA
3. Department of Cell and Developmental Biology; University of North Carolina at Chapel Hill; Chapel Hill; NC; USA
4. Saudi Diagnostics Laboratory; King Faisal Specialist Hospital & Research Centre; Riyadh; Saudi Arabia