Funding for this research was provided by:
MINECO (Project RYC-2012-11856)
Aragon Government and Fondo Social Europeo (GUIA group T-10)
MINECO (Spain) and FEDER funds (Projects AGL2015-67362-P)
Article History
Received: 6 February 2019
Revised: 21 March 2019
Accepted: 4 April 2019
First Online: 4 May 2019
Compliance with ethical standards
: No human participants or animals are involved in the research.
: The authors declare that they have no conflict of interest.