Received: 24 June 2019
Accepted: 20 October 2019
First Online: 9 November 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Brazilian National Health Council (CNS) 466/2012 resolution, following the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. The board of the local research institute, the School of Arts, Sciences and Humanities (CEP-EACH) from the University of São Paulo (USP), approved this study in September 24th 2015.
: Active written informed consent was obtained from all participants’ parents included in the study prior to data collection. Child assent was obtained from all participants after parental consent.