Text and Data Mining valid from 2017-09-14
Received: 17 May 2017
Accepted: 6 September 2017
First Online: 14 September 2017
Compliance with ethical standards
: The authors declare that there is no conflict of interest regarding the publication of this paper.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Federal University of São Paulo - UNIFESP/EPM, SP, Brazil, nº 014116/2014 as recommended by Resolution 196/96.
: Parents and/or guardians and adolescents who agreed to participate in the study signed the informed consent form prior to data collection.