Published on in Vol 8, No 8 (2020): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19661, first published
.

1 Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander University Erlangen-Nürnberg , Erlangen , DE
2 Chair of Digital Health, Friedrich-Alexander University Erlangen-Nürnberg , Erlangen , DE
3 Section Rheumatology, Sozialstiftung Bamberg , Bamberg , DE