[1] Univ Med Ctr Hamburg Eppendorf, Childrens Hosp, D-20246 Hamburg, Germany
[2] Univ Gottingen, Dept Pediat & Pediat Neurol, Gottingen, Germany
[3] Univ Tubingen, Dept Pediat Neurol, D-72074 Tubingen, Germany
[4] Univ Rostock, Ctr Mental Hlth, Albercht Kossel Inst Neuroregenerat, D-2500 Rostock, Germany
[5] Univ Tubingen, Hertie Inst Clin Brain Res, D-72074 Tubingen, Germany
[6] Univ Tubingen, Dept Neurol, D-72074 Tubingen, Germany