[1] Univ Hosp Essen, Div Clin Neurooncol, Essen, Germany
[2] Univ Bonn, Med Ctr, Div Clin Neurooncol, Bonn, Germany
[3] Univ Bonn, Dept Neurol, Div Clin Neurooncol, Bonn, Germany
[4] Univ Bonn, CIO, Bonn, Germany
[5] German Canc Consortium DKTK, West German Canc Ctr WTZ, DKFZ Div Translat Neurooncol, Essen, Germany
[6] Univ Hosp Essen, Dept Neurosurg, Essen, Germany
[7] Univ Hosp Essen, Dept Neurol, Essen, Germany
[8] Univ Hosp Essen, Dept Radiotherapy, Essen, Germany