Text and Data Mining valid from 2019-02-01
First Online: 13 February 2019
Compliance with Ethical Standards
: Johannes Kraft and Matthias Guckenberger each declare no potential conflicts of interest. Nicolaus Andratschke reports grants from Brainlab AG, outside the submitted work. Giuseppe Minniti reports personal fees from BrainLAb, outside the submitted work. Jaap Zindler has no personal conflicts of interest—MAASTRO Clinic has a research agreement with Varian Medical Systems Palo Alto USA.
: This article does not contain any studies with human or animal subjects performed by any of the authors.