Perez-Sousa, Miguel A. http://orcid.org/0000-0003-4392-6850
Olivares, Pedro R.
Escobar-Alvarez, Juan A.
Parraça, Jose A.
Gusi, Narcis
Funding for this research was provided by:
Gobierno de Extremadura
Article History
Received: 31 January 2018
Accepted: 23 July 2018
First Online: 31 July 2018
Ethics approval and consent to participate
: The ethical approval of this study was approved by the Committee on Biomedical Ethics of the University of Extremadura (REF. 98–2007). All participants as well as their parents must sign the informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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