Received: 10 May 2019
Accepted: 29 August 2019
First Online: 9 September 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of Canton of Zürich (BASEC-Nr. 2018–00655) and by the multidisciplinary uro-oncology board of Hirslanden Clinic, Zürich. Written informed consent was obtained from the patients for SBRT treatment and for the use of the anonymized data for research purposes.
: Not applicable.
: The authors declare that they have no competing interests.