Funding for this research was provided by:
Berliner Krebsgesellschaft (EHFF201726)
Received: 13 November 2019
Accepted: 5 May 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: The approval of the study was provided by the ethics committee of Charité - Universitätsmedizin Berlin, Germany, under the reference number EA4/093/17. Written informed consent was obtained from all participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.