Text and Data Mining valid from 2019-02-12
Received: 3 July 2018
Accepted: 30 January 2019
First Online: 12 February 2019
Ethics approval and consent to participate
: This study was submitted to the local Ethics Committee, “Comitê de Ética da Universidade Federal de São Paulo – Plataforma Brasil”, number: 940.191. The principals/coordinators and the parents were informed about the study, and their participation was voluntary.
: Not applicable.
: The authors declare that they have no competing interests.
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