Funding for this research was provided by:
Received: 13 January 2017
Accepted: 24 January 2018
First Online: 20 February 2018
Ethics approval and consent to participate
: This study was carried out according to the recommendations of the ethics committee of the Medical Faculty of the Ludwig-Maximilians-University Munich, Germany. The current study has been performed in a retrospective manner in a cohort of patients diagnosed and treated according to national guidelines. In addition, the data set as well as the specimens were irreversibly anonymized prior to inclusion in the study. Hence, under the circumstances aforementioned, neither a written consent nor a project specific approval by the ethic committee was necessary.The study was performed according to the standards set in the declaration of Helsinki 1975. All researchers were blinded from patient data during experimental analysis.
: This study used tumor tissue that had initially been collected for histo-pathological diagnostics. At the time, the tissue was examined for the current study all diagnostic procedures had already been fully completed and the tissue used was thus classified as left-over material. All patient data were fully anonymized. As per declaration of our ethics committee (Ludwig-Maximilians-University Medical School (Munich, Germany)) no written informed consent of the participants is needed given the circumstances described above.
: The authors declare that they have no competing interests.
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