Published on in Vol 2 , No 2 (2018) :Jul-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/11977, first published
.

1 Department of Health Psychology, Faculty of Psychology, University of Hagen, Hagen, DE
2 Department of Clinical Psychology, Psychotherapy and Experimental Psychopathology, Institute of Psychology, University of Mainz, Mainz, DE