Funding for this research was provided by:
Received: 10 September 2020
Accepted: 5 October 2021
First Online: 22 October 2021
: The protocol was approved by the University of Regensburg Ethics Committee (GeschZ 19–1530-104) and it was conducted in accordance with the ethical standards of the declaration of Helsinki. Based on a retrospective analysis, a fully anonymized set of clinical data and in agreement with the decision of the Ethics Committee, signing an informed consent was not required.
: Not applicable.
: The authors declare that they have no competing interests.