Funding for this research was provided by:
Junta de Extremadura (1B16171)
Ministerio de Economía y Competitividad (MTM2016-79765-P)
Received: 10 April 2018
Accepted: 13 March 2019
First Online: 27 March 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.