Received: 21 February 2019
Revised: 6 August 2019
Accepted: 23 August 2019
First Online: 1 October 2019
Ethics approval and consent to participate
: As the research used information contained in a public availability database, the Research Ethics Committee of the Medical School of Ribeirão Preto, University of São Paulo, approved it without restrictions.
: Not applicable.
: The authors declare that they have no competing interests.