[1] Natl Res Ctr, Dept Clin Genet, Cairo, Egypt
[2] Cairo Univ, Pediat Neurol Dept, Cairo, Egypt
[3] Univ Calif San Diego, Dept Neurosci, Howard Hughes Med Inst, Neurogenet Lab, San Diego, CA 92103 USA
[4] Broad Inst Harvard & Massachusetts Inst Technol, Cambridge, MA USA