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Article History

Received: 2 February 2020

Accepted: 31 July 2020

First Online: 12 August 2020

Ethics approval and consent to participate

: This study has been performed in accordance with the ethical standards in the 1964 Declaration of Helsinki. Ethical approval for this study was obtained from the local ethics committee “Ethikkommission bei der LMU München” (Munich, Germany, Reference No. 159-14). Written informed consent was obtained from all patients for their anonymized information to be published in this article.

: Not applicable.

: The institution of BT, MB, AA, FK, BS, PT, and EO has received funding from the non-profit “German Osteoarthritis Society” (“Deutsche Arthrose-Hilfe e.V.”) to support this clinical study. All authors confirm that this funding source had no involvement regarding in study design; in the collection, analysis, and interpretation of data; in the writing of the report; and in the decision to submit the article for publication. Each author certifies that he or she has no commercial associations (e.g., consultancies, stock ownership, equity interest, and patent/licensing arrangements) that might pose a conflict of interest in connection with the submitted article.