Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01ER0809, 01ER0809, 01ER0808)
Received: 15 September 2017
Accepted: 23 May 2018
First Online: 31 May 2018
Ethics approval and consent to participate
: All participants gave written informed consent and the study was approved by the responsible ethics committees at both study centers (Potsdam: Ethics Committee of the Medical Association of the State of Brandenburg; Heidelberg: Ethics Committee of the Heidelberg University Hospital) [CitationRef removed]. Tissue samples were provided by the tissue bank of the National Center for Tumor Diseases (NCT, Heidelberg, Germany) in accordance with the regulations of the tissue bank and the approval of the ethics committee of the Heidelberg University Hospital.
: The authors declare that they have no competing interests.
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