Funding for this research was provided by:
Received: 20 August 2021
Accepted: 29 November 2021
First Online: 18 December 2021
: The study protocol of this study was approved by the institutional ethics committee (Ethik-Kommission der Medizinischen Fakultät der Universität Leipzig, reference 202/19-ek). The study was conducted in accordance with all local regulations and followed the principles of the Helsinki declaration.Informed consent was not obtained due to the retrospective nature of the study in accordance with §34 of the Saxon Hospital Act. Patients who earlier had expressed objection to the use of their data for research purposes were excluded.
: N/AAvailability of data and materials: Anonymized grouped data available upon request from the corresponding author.
: GO is Associated Editor of BMC Musculoskeletal Disorders. The other authors declare that they have no conflicts of interest.