Funding for this research was provided by:
Received: 9 November 2021
Accepted: 21 February 2022
First Online: 12 March 2022
: This retrospective study was ethically approved by the institutional review board (No. 09/05/20, “Ethics Committee of the University of Göttingen”, Von-Siebold-Str. 4, 37075 Göttingen, Germany). This retrospective study adhered to the 2013 Helsinki Declaration. Due to the retrospective, observational nature of the study, the ethics committee (“Ethics Committee of the University of Göttingen”) waived the need for informed consent.
: Not applicable.
: The authors declare that they have no competing interests.