. 2017 Oct 18;18(1):1–7. doi: 10.1016/j.ijchp.2017.08.001
© 2017 Asociaciòn Espa˜nola de Psicología Conductual. Published by Elsevier Espa˜na, S.L.U.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).