. 2020 Aug 31;22(8):e17790. doi: 10.2196/17790
©Irene Sequi-Dominguez, Celia Alvarez-Bueno, Vicente Martinez-Vizcaino, Rubén Fernandez-Rodriguez, Alicia del Saz Lara, Iván Cavero-Redondo. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 31.08.2020.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), 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 1.
PICO (population, intervention, comparison, and outcome) search strategy.