Funding for this research was provided by:
Ministerio de Economía y Competitividad (Project AGL2014-52928-C2)
European Regional Development Fund (Project AGL2014-52928-C2)
Universidad de Valladolid (Pre-doctoral fellowship, Pre-doctoral fellowship)
Article History
Received: 19 October 2018
Accepted: 28 February 2019
First Online: 9 March 2019