Published on in Vol 6, No 6 (2018): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10422, first published
.
1 Kaia Health Software, Munich, Germany
2 Department of Orthopaedic Surgery, Physical Medicine and Rehabilitation, University Hospital of Munich (LMU), Campus Grosshadern, Munich, Germany
3 Unabhängige statistische Beratung Bernhard Ulm, Munich, Germany