Funding for this research was provided by:
Fundação Oswaldo Cruz (Intramural Research Program)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (fellowship, senior fellowship)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (OAS-PAEC-CAPES finance code 001)
Fundação de Amparo à Pesquisa do Estado da Bahia (fellowship)
Received: 8 October 2020
Accepted: 1 June 2021
First Online: 9 June 2021
: There were no patients directly involved in the research. The present study used public data from previously published studies to perform a systematic review. All information given to the research team was de-identified. Thus, the study was exempted from revision by the Institutional Review Board of the Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Brazil, and did not require signed consent forms.
: Not applicable.
: The authors declare no competing interests.