[1] Tech Univ Dresden, Dept Pediat Neurol, D-01307 Dresden, Germany
[2] Univ Wurzburg, Inst Human Genet, Wurzburg, Germany
[3] Tech Univ Dresden, Dept Radiol, Dresden, Germany
[4] Tech Univ Dresden, Childrens Hosp, Dresden, Germany
[5] INSERM, U 676 Paris 7, Paris, France
[6] Charite, Dept Pediat Neurol, Berlin, Germany