Funding for this research was provided by:
Ministry of Economy and Competitiveness-Carlos III Health Institute (FIS PI19/01919)
A grant from the the Regional government (3A2400/NL38532)
A grant from the University of Castilla-La Mancha (Fi17/332, 2018-CPUCLM-7813)
Received: 15 November 2018
Accepted: 3 April 2019
First Online: 18 April 2019
Ethics approval and consent to participate
: The study protocol obtained a favorable evaluation by the Clinical Research Ethics Committee of the “Virgen de la Luz” Hospital, Cuenca (2016/PI0216). The school boards approved the study and parents were asked to provide written consent for the participation of their children; in those cases, in which the children were not under the guardianship of the parents, the signature of the written consent was requested to the legal guardians, as detailed in the document approved by the Clinical Research Ethics Committee. In addition, schoolchildren gave their verbal consent when their collaboration was requested.
: Not applicable.
: The authors declare that they have no competing interests.
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