Funding for this research was provided by:
Fundação de Amparo à Pesquisa do Estado de São Paulo (2011/01469-7, 2013/04138-7, 2017/05371-8, 2017/22004-9)
National Institute on Drug Abuse (5 U10 DA013714-10)
Received: 13 November 2018
Accepted: 13 June 2019
First Online: 15 July 2019
Ethics approval and consent to participate
: We state that all participants enrolled in this study provided written informed consent. The study was approved by the Research Ethics Committee of the Federal University of São Paulo and by the Ethics Committee from the Brazilian National Ministry of Health (CAAE No: 00745912.4.0000.5505).
: Not applicable.
: The authors declare that they have no competing interests.