Funding for this research was provided by:
Received: 15 April 2021
Accepted: 3 July 2021
First Online: 30 October 2021
: The study followed the principles of the Declaration of Helsinki and the guidelines of Good Clinical Practice and was approved by the local ethics committee of the University Hospital of Bonn (Ethik-Kommission der Medizinischen Fakultät Bonn – Lfd. Nr. 100/20). Due to the retrospective design of the study, the need for informed consent was waived by the ethics committee of the University Hospital of Bonn, Germany, (Chairman Prof. Dr. Racké).
: All authors attest to the validity of the data and give consent to their publication.
: The authors declare that they have no competing interests.