Funding for this research was provided by:
Consejería de Educación, Junta de Castilla y León (VA332A12-2)
Article History
Received: 30 May 2018
Accepted: 29 July 2018
First Online: 15 August 2018
Compliance with Ethical Standards
:
: Cristina Andrés-Iglesiasa declares that she has no conflict of interest. Carlos A. Blanco declares that he has no conflict of interest. Olimpio Montero declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study as authors of it.