[1] Tech Univ Dresden, Dept Pediat, Med Fak Carl Gustav Carus, Dresden, Germany
[2] Univ Tubingen, Dept Neuropediat, Tubingen, Germany
[3] Bolzano Reg Hosp, Paediat Dept, Child Neurol & Psychiat Unit, Bolzano, Italy
[4] Bolzano Reg Hosp, Paediat Dept, Child Haematol & Oncol Unit, Bolzano, Italy
[5] Univ Tubingen, Inst Med Genet & Appl Genom, Tubingen, Germany
[6] Univ Tubingen, Ctr Neurol, Tubingen, Germany
[7] Univ Tubingen, Hertie Inst Clin Brain Res, Tubingen, Germany
[8] German Ctr Neurodegenerat Dis, Bonn, Germany