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Authors
Strizek, B. https://orcid.org/0000-0003-3625-7097
Gottschalk, I.
Recker, F.
Weber, E.
Flöck, A.
Gembruch, U.
Geipel, A.
Berg, C.
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Article History
Received: 2 February 2020
Accepted: 8 May 2020
First Online: 24 May 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was conducted ethically in accordance with the World Medical Association Declaration of Helsinki. The institutional review boards of the two centers do not require formal approval for retrospective archive studies; therefore it was waived for this study.
