Funding for this research was provided by:
Received: 13 May 2021
Accepted: 31 December 2021
First Online: 15 January 2022
: This study was approved by the institutional ethics committee review board of the medical faculty of the University of Leipzig in Leipzig, Germany. As this was a retrospective study, the need for informed consent was waived by the ethical committee of the medical faculty of the University of Leipzig. We confirm that all methods are carried out in accordance with the relevant guidelines and regulations of the ethics committee.
: Not applicable.
: None of the authors have conflicts of interests or disclosures to report regarding this work.