Funding for this research was provided by:
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (E26/201.488/2014)
Received: 11 December 2018
Accepted: 16 July 2019
First Online: 20 July 2019
Ethics approval and consent to participate
: The protocol of this research was approved by the Ethics Committee of the Instituto de Medicina Social of the Universidade do Estado do Rio de Janeiro (CAAE 0011.0.259.000–11), July 19th, 2011.
: Not applicable.
: The authors declare that they have no competing interests.