Published on in Vol 6 , No 2 (2018) :February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9486, first published
.

1 Department of Radiation Oncology, Technical University of Munich, Munich, DE
2 Institute for Innovative Radiotherapy, Helmholtz Zentrum München, Neuherberg, DE