Simoes, Elisabeth https://orcid.org/0000-0002-6149-6439
Graf, Joachim https://orcid.org/0000-0003-2208-0446
Sokolov, Alexander N. https://orcid.org/0000-0003-3691-8449
Grischke, Eva-Maria https://orcid.org/0000-0001-7413-5053
Hartkopf, Andreas D. https://orcid.org/0000-0003-4831-2401
Hahn, Markus
Weiss, Martin
Abele, Harald https://orcid.org/0000-0002-0429-7118
Seeger, Harald https://orcid.org/0000-0003-1552-7983
Brucker, Sara Y. https://orcid.org/0000-0001-5162-1542
Article History
Received: 20 February 2018
Accepted: 13 June 2018
First Online: 21 June 2018
Compliance with ethical standards
:
: Author Elisabeth Simoes declares that she has no conflict of interest. Author Joachim Graf declares that he has no conflict of interest. Author Alexander N. Sokolov declares that he has no conflict of interest. Author Eva-Maria Grischke declares that she has no conflict of interest. Author Andreas D. Hartkopf declares that he has no conflict of interest. Author Markus Hahn declares that he has no conflict of interest. Author Martin Weiss declares that he has no conflict of interest. Author Harald Abele declares that he has no conflict of interest. Author Harald Seeger declares that he has no conflict of interest. Author Sara Yvonne Brucker declares that he has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Since this paper makes recourse to a secondary data analysis in which anonymized data of the Comprehensive Cancer Center Tübingen were evaluated, no approval from the ethics committee was necessary according to the provisions of the Ethics Committee of the University Hospital Tübingen.
: Informed consent was obtained from all individual participants included in the study.