Received: 17 March 2018
Accepted: 23 September 2018
First Online: 12 October 2018
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of Alagoas State Health Sciences University (Universidade Estadual de Ciências da Saúde de Alagoas – UNICISAL; CAAE no. 37977014.0.0000.5011) on 5 March 2015. All the participants signed an informed consent form; participation was voluntary. We clarified that some of the participants involved in the study were younger than 16 years of age and that written consent was obtained from a parent or legal guardian on behalf of those participants who were under the age of 16.
: Not applicable.
: The authors declare that they have no competing interests.
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