Published on in Vol 5, No 2 (2018): Apr-Jun
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10735, first published
.
1 Department of Health Psychology, Faculty of Psychology, University of Hagen, Hagen, Germany
2 Department of Clinical Psychology and Psychotherapy, Alexander-University Erlangen-Nuremberg, Erlangen, Germany