Funding for this research was provided by:
Ministerio de Economía, Industria y Competitividad, Gobierno de España (CTM2013-48292-C3-2-R, CTM2016-80095-C2-1-R)
Article History
Received: 16 January 2019
Accepted: 14 November 2019
First Online: 10 December 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.