Published on in Vol 6, No 3 (2019): Jul-Sep
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12695, first published
.
1 Institute for General Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
2 Institute of General Practice and Family Medicine, University Hospital Bonn, University of Bonn, Bonn, Germany