Text and Data Mining valid from 2019-11-27
Received: 17 June 2019
Accepted: 13 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: The Brazilian Health Survey PNS was approved by the National Research Ethics Committee of the Brazilian National Health Council, Health Ministry, under number n.° 328,159 on June 26, 2013. Written consent for participate statement was obtained.
: Not applicable.
: The authors declare that they have no competing interests.