[1] Univ Med Ctr Nijmegen, Dept Human Genet 417, NL-6500 HB Nijmegen, Netherlands
[2] Netherlands Inst Dev Biol, Hubrecht Lab, NL-3584 CT Utrecht, Netherlands
[3] Univ Med Ctr Leiden, Dept Clin Genet, Leiden, Netherlands
[4] Univ Chicago, Dept Human Genet, Chicago, IL 60637 USA
[5] Univ Chicago, Dept Neurol, Chicago, IL 60637 USA
[6] Univ Chicago, Dept Pediat, Chicago, IL 60637 USA
[7] Univ Barcelona, Dept Genet, Barcelona, Spain
[8] Beth Israel Deaconess Med Ctr, Div Neurogenet, Boston, MA 02215 USA
[9] Harvard Univ, Sch Med, Boston, MA USA
[10] Hacettepe Childrens Hosp Med Ctr, Ankara, Turkey