Funding for this research was provided by:
Received: 10 November 2021
Accepted: 17 March 2022
First Online: 24 March 2022
: For this retrospective study, informed consent was waived, and permission obtained from the Institutional Review Board of the University of Würzburg, Germany. All procedures were in accordance with the ethical standards of the institutional and national research committee and with the 1975 Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.