Published on in Vol 5, No 4 (2018): Oct-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10698, first published
.
1 Department of Sports Medicine, Rehabilitation and Disease Prevention, Johannes Gutenberg-University, Mainz, Germany
2 Department of Psychiatry and Psychotherapy, University Medical Center, Mainz, Germany
3 Faculty of Arts and Education, University of Stavanger, Stavanger, Norway