Correction to: Radiat Oncol (2020)15:238 https://doi.org/10.1186/s13014-020-01682-5

After publication of this article [1], the authors reported that the captions for figures 3–5 had to be corrected to acknowledge the original source. The Acknowledgements section has been corrected too. The correction does not have any effect on the results or conclusions of the paper.

The original article [1] has been updated.