Received: 4 September 2019
Accepted: 20 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: The Ethic committee of the Technical University Munich has approved this retrospective study (number 84/15). All patients gave their informed written consent for radiotherapy. The need for a second informed consent for his retrospective study was deemed unnecessary.
: Not applicable.
: MD – Wife employed at Brainlab.SK– received speaker honoraria from Accuray.CS– received a scholarship from Medac GmbH; received a travel grant from NovoCure Ltd.; contributed to a brochure for patients about GBM which was partially sponsored by NovoCure, received speakers Honoria from Teva GmbH.NMD: editor at BMC.SEC: Advisory Boards/Advisor: BMS, Astra Zeneca, Roche, Novocure, Daiichi Sankyo, Icotec; Speakers Honoraria: BMS, Astra Zeneca, Roche, Novocure, Daiichi Sankyo, Icotec, Brainlab, varian, Accuray, Zeiss Meditec, Dr. Sennewald, Elekta, Merck Darmstadt, Medac.All other authors have nothing to disclose.