Delgado-Floody, Pedro
Espinoza-Silva, Miguel
García-Pinillos, Felipe
Latorre-Román, Pedro
Article History
Received: 6 December 2017
Revised: 12 March 2018
Accepted: 8 April 2018
First Online: 21 April 2018
Compliance with ethical standards
: The investigation complied with the 2013 Helsinki Declaration and was approved by the Ethics Committee of the University of Jaen (Spain).
: The authors declare that they have no conflict of interest.
: The parents signed an informed consent document before the investigation.