Schallenberg, Simon
Bork, Julian
Essakly, Ahlem
Alakus, Hakan
Buettner, Reinhard
Hillmer, Axel M.
Bruns, Christiane
Schroeder, Wolfgang
Zander, Thomas
Loeser, Heike
Gebauer, Florian
Quaas, Alexander
Article History
Received: 25 May 2019
Accepted: 3 December 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: Procedures were followed as outlined in accordance with ethical standards formulated in the Helsinki Declaration 1975 (and revised in 1983). Patients gave their written consent to usage of their tumor specimens and the objective of the project is primarily in the field of diagnostics and quality assurance, an approval was obtained from the University of Cologne Ethics Committee (reference number: 13–091 and 10–242; Lehmann and Grass et al).
: Not applicable.
: The authors declare that they have no competing interests.