Received: 16 April 2019
Accepted: 22 August 2019
First Online: 18 September 2019
Ethics approval and consent to participate
: This study included was approved by the ethical committee of the Federal University of São Paulo, under the approval number 1093965). All participants gave written consent to participate.
: No individual information was used. All authors approved the submitted version of the manuscript.
: The authors declare that they have no competing interests.