Published on in Vol 23, No 7 (2021): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/26658, first published
.

1 Department of Orthopaedics, Physical Medicine, and Rehabilitation, University Hospital, Ludwig Maximilians University of Munich, Munich , DE
2 Kaia Health GmbH , Munich , DE
3 Unabhängige statistische Beratung Bernhard Ulm , Munich , DE
*these authors contributed equally