Funding for this research was provided by:
Medizinischen Fakultät Heidelberg, Universität Heidelberg
Text and Data Mining valid from 2019-10-30
Received: 26 February 2019
Accepted: 15 October 2019
First Online: 30 October 2019
Compliance with ethical standards
: The authors declare no conflict of interest regarding this paper.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. All patients provided written consent for the use of their tissue samples. The study was approved by the Ethics Committee of Ruprecht Karls University Heidelberg (S239/2005).