Published on in Vol 8, No 12 (2020): December
This is a member publication of Charite - Universitaetsmedizin Berlin, Medizinische Bibliothek, Germany
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19608, first published
.
1 Geriatrics Research Group, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany