Funding for this research was provided by:
RWTH Aachen University (113/15)
Received: 4 September 2017
Accepted: 22 January 2018
First Online: 6 February 2018
Ethics approval and consent to participate
: As stated in the “InternalRef removed” section, tissue and urine samples for the anonymized and retrospective study were obtained from the archives of the Institute of Pathology (RWTH Aachen University), the RWTH centralized biomaterial bank (RWTH cBMB), and the Technical University of Munich and approved by the local Institutional Review Board (IRB) of the Medical Faculty of RWTH Aachen University and the Technical University of Munich.
: Not applicable.
: The authors declare that they have no competing interests.
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