Contreras, María José
Escrig, Rebeca
Prieto, Gerardo
Elosúa, M. Rosa
Funding for this research was provided by:
Ministerio de Economía y Competitividad (EDU2013-46437-R)
Ministerio de Economía y Competitividad (EDU2013-46437-R)
Article History
Received: 22 April 2017
Accepted: 21 March 2018
First Online: 27 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The ethics committee of the university (UNED) approved the study with written informed consent from all participants. Written consent was obtained from them, in accordance with the Declaration of Helsinki.