Kaufmann, Jost http://orcid.org/0000-0002-5289-6465
Bode, Katrin
Puder, Christian
Laschat, Michael
Engelhardt, Thomas http://orcid.org/0000-0002-3954-5820
Wappler, Frank http://orcid.org/0000-0001-9020-3060
Article History
Received: 23 July 2019
Accepted: 10 September 2019
First Online: 17 September 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed were in accordance with the ethical standards of the institutional research committee (waiver of formal ethical approval by Ethics Committee of University Witten/Herdecke, May 12th 2018 due to retrospective analysis with no personal data reported) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.