. 2017 Mar 27;19(3):e76. doi: 10.2196/jmir.4709
©Rachel R Bian, Gretchen A Piatt, Ananda Sen, Melissa A Plegue, Mariana L De Michele, Dina Hafez, Christina M Czuhajewski, Lorraine R Buis, Neal Kaufman, Caroline R Richardson. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 27.03.2017.
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.
Figure 2.
Funnel plot for publication bias analysis.