Valenzuela, Aurora http://orcid.org/0000-0001-6595-0152
Guerra-Hernández, Eduardo
Rufián-Henares, José Ángel
Márquez-Ruiz, Ana Belén
Hougen, Hans Petter
García-Villanova, Belén
Funding for this research was provided by:
Ministerio de Educación, Cultura y Deporte (Project PM97-0182)
Article History
Received: 20 June 2018
Accepted: 26 July 2018
First Online: 1 August 2018
Compliance with ethical standards
: The protocols to collect samples from human subjects were approved by the corresponding Ethics Committees for Human Research of the University of Granada (Spain) and the University of Copenhagen (Denmark), and the study was conducted in accordance with the ethical standards laid down by the Declaration of Helsinki.
: The authors declare that they have no conflict of interest.