Funding for this research was provided by:
Agència de Gestió d'Ajuts Universitaris i de Recerca (2014 SGR 240)
Instituto de Salud Carlos III FEDER (PI11/01900 and CB06/02/0029)
Text and Data Mining valid from 2018-07-19
Received: 26 March 2018
Revised: 15 June 2018
Accepted: 5 July 2018
First Online: 19 July 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The project was approved by the local Ethics Committee (CEIC-PSMAR, Barcelona, Spain).
: Parental written consent was obtained on behalf of each of the participating children.