Published on in Vol 23, No 1 (2021): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/17691, first published
.
1 Institut of Public Health, Charité - Universitätsmedizin Berlin, Berlin, Germany
2 Institute of Gerontological Health Services and Nursing Research, Ravensburg-Weingarten University of Applied Sciences, Weingarten, Germany
3 Department of Population Medicine and Health Services Research, School of Public Health, Bielefeld University, Bielefeld, Germany