[1] Radboud Univ Nijmegen, Med Ctr, NL-6525 ED Nijmegen, Netherlands
[2] Weizmann Inst Sci, Dept Mol Genet, IL-76100 Rehovot, Israel
[3] Inst Pasteur, Dept Neurosci, Paris, France
[4] Ctr Invest Principe Felipe, Valencia, Spain
[5] UCL, Inst Child Hlth, Neural Dev Unit, London WC1E 6BT, England
[6] KNAW, Hubrecht Inst, NL-3584 CT Utrecht, Netherlands
[7] Univ Med Ctr Utrecht, Utrecht, Netherlands
[8] Leiden Univ, Inst Biol Leiden, NL-2300 RA Leiden, Netherlands