[1] Penn State Univ, Hershey Med Ctr, Dept Neurol, 30 Hope Dr,EC037, Hershey, PA 17033 USA
[2] Lebanese Amer Univ, Dept Pediat, Div Neurol, Gilbert & Rose Marie Chagoury Sch Med, Byblos, Lebanon
[3] Lebanese Amer Univ, Dept Internal Med, Div Neurol, Gilbert & Rose Marie Chagoury Sch Med, Byblos, Lebanon
[4] Univ Pittsburgh, Dept Neurol Surg, Med Ctr, Pittsburgh, PA 15260 USA
[5] Univ Pittsburgh, Dept Neurol, Med Ctr, Pittsburgh, PA 15260 USA
[6] George Washington Univ, Sch Med, Dept Neurol, Childrens Natl Hlth Syst, Washington, DC USA
[7] George Washington Univ, Sch Med, Dept Pediat, Childrens Natl Hlth Syst, Washington, DC 20052 USA