[1] German Canc Res Ctr, Heidelberg, Germany
[2] Univ Hosp Heidelberg, Inst Pathol, Dept Neuropathol, Heidelberg, Germany
[3] Hopp Childrens Canc Ctr KiTZ, Heidelberg, Germany
[4] Heidelberg Univ Hosp, Natl Ctr Tumor Dis, Dept Neurol, Heidelberg, Germany
[5] Heidelberg Univ Hosp, Natl Ctr Tumor Dis, Neurooncol Program, Heidelberg, Germany