[1] Univ Munster, Dept Neurol, D-48149 Munster, Germany
[2] Univ Iowa, Dept Psychiat, Iowa City, IA 52242 USA
[3] Univ British Columbia, Dept Med Genet, Vancouver, BC, Canada
[4] Dept Genet & Cytogenet, Paris, France
[5] Univ Paris 06, Grp Hosp Pitie Salpetriere, APHP, INSERM,UMR S975, Paris, France
[6] UCL, Inst Neurol, London, England
[7] Leiden Univ, Med Ctr, Dept Neurol, Leiden, Netherlands