Published on in Vol 21 , No 3 (2019) :March
Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/10736, first published .
1 Faculty of Health, Hogeschool van Arnhem en Nijmegen University of Applied Sciences, Nijmegen, NL
2 Diafaan Foundation (retired since January 2015), Zevenaar, NL
3 Department for Primary and Community Care, Radboud University Medical Centre, Nijmegen, NL