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Authors
Zirk, Matthias https://orcid.org/0000-0001-8776-0042
Zoeller, Joachim E.
Peters, Franziska
Ringendahl, Linda
Buller, Johannes
Kreppel, Matthias
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Article History
Received: 20 March 2020
Accepted: 3 August 2020
First Online: 10 August 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Local ethics board exempts this study from a specific ethic vote due to its pure retrospective nature.
: For this type of study (retrospective study), formal consent is not required. Local ethic committee exempts this study from a specific ethic vote due to its pure retrospective nature.
