Funding for this research was provided by:
German Cancer Society (Seeding Grand TII)
Received: 23 July 2018
Accepted: 17 January 2019
First Online: 1 February 2019
Ethics approval and consent to participate
: The local ethics committee of the University of Freiburg approved data evaluation, imaging procedures and experimental design (protocol 100,020/09 and 5565/15). The methods were carried out in accordance with the approved guidelines. Written informed consent was obtained.
: Not applicable
: The authors declare that they have no competing interests.
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