© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 3.0 License  which permits any use, reproduction and distribution of the work without
further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.
com/en-us/nam/open-access-at-sage).
La licencia del ítem se describe como © The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 3.0 License which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub. com/en-us/nam/open-access-at-sage).