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 Department of Population Medicine and Health Services Research, School of Public Health, Bielefeld University, Bielefeld, DE
2 Institut of Public Health, Charité - Universitätsmedizin Berlin, Berlin, DE
3 Institute of Gerontological Health Services and Nursing Research, Ravensburg-Weingarten University of Applied Sciences, Weingarten, DE