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Article History

Received: 15 June 2020

Accepted: 16 October 2020

First Online: 30 November 2020

Change Date: 23 December 2020

Change Type: Update

Change Details: The paper was amended to add the OA funding note.

Ethics approval and consent to participate

: Ethical approval was obtained from the ethics committee of the German Association of Physical Therapists (Deutscher Verband für Physiotherapie e. V., Ethics Committee No.: 2016–10). The participants provided written informed consent before participating in any way or undergoing any procedure in this study.

: Not applicable.

: The authors declare that there is no conflict of interest.