Funding for this research was provided by:
Received: 23 July 2021
Accepted: 13 September 2021
First Online: 18 October 2021
: The study was approved by the ethics committee of the University of Tübingen (application no. 965/2020BO, 1st February 2021). Due to anonymized data and its retrospective design, the ethics committee granted a waiver of informed consent.
: Not applicable.
: The authors declare no conflict of interest.