[1] Univ Med Ctr Hamburg Eppendorf, Dept Pediat Hematol & Oncol, D-20246 Hamburg, Germany
[2] Univ Med Ctr Hamburg Eppendorf, Dept Neurol Surg, D-20246 Hamburg, Germany
[3] Univ Med Ctr Hamburg Eppendorf, Dept Neuropathol, D-20246 Hamburg, Germany
[4] Univ Med Ctr Hamburg Eppendorf, Dept Diagnost & Intervent Neuroradiol, D-20246 Hamburg, Germany
[5] Univ Med Ctr Hamburg Eppendorf, Dept Radiotherapy & Radiat Oncol, D-20246 Hamburg, Germany
[6] Univ Med Ctr Hamburg Eppendorf, Dept Pediat, D-20246 Hamburg, Germany
[7] Klinikum Oldenburg, Dept Pediat, Oldenburg, Germany