[1] Univ Klinikum Essen, Klin Neuroonkol, Essen, Germany
[2] Univ Klinikum Essen, Translat Onkol, Westdeutsch Tumorzentrum, Essen, Germany
[3] Univ Klinikum Bonn, Klin Neuroonkol, Bonn, Germany
[4] Univ Klinikum Essen, Klin Neurochirurg, Essen, Germany
[5] Univ Klinikum Regensburg, Neurochirurg, Regensburg, Germany
[6] Univ Klinikum Regensburg, Neurol NeuroOnkol, Regensburg, Germany
[7] Univ Klinikum Essen, Innere Klin Tumorforsch, Essen, Germany
[8] Univ Klinikum Essen, Neurol Klin, Essen, Germany
[9] Tech Univ Munich, Klinikum Rechts Isar, Klin & Poliklin RadioOnkol & Strahlentherapie, Munich, Germany
[10] Univ Klinikum Freiburg, Klin Strahlenheilkunde, Freiburg, Germany
[11] Univ Klinikum Essen, Klin Strahlenheilkunde, Essen, Germany