©Madeleine Svensson, Mari Hult, Marianne van der Mark, Alessandra Grotta, Josefine Jonasson, Yvonne von Hausswolff-Juhlin, Stephan Rössner, Ylva Trolle Lagerros. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 3.11.2014.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.