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Authors
Frenken, Michael http://orcid.org/0000-0001-5197-6861
Kemmet, Olga
Frenken, Miriam
Röhrig, Ingo
Fischer, Lars
Hellinger, Achim http://orcid.org/0000-0002-1089-4496
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Article History
Received: 6 February 2022
Revised: 20 July 2022
Accepted: 24 July 2022
First Online: 8 August 2022
Declarations
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: All procedures performed in studies involving human participants were done so 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. For the retrospective part of the study, formal consent was not required.
: Informed consent was obtained from all participants in the study who participated in the last follow-up.
: The authors declare no competing interests.
: The present study complies with each item on the STROBE checklist.
