Funding for this research was provided by:
Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (100.248/2014)
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Received: 13 August 2020
Accepted: 26 March 2021
First Online: 13 April 2021
: The project was approved by the Ethics Committee of the Escola Nacional de Saúde Pública/ Fiocruz (process number: 0051.0.031.000-04, 2005). The direction of the schools and the parents signed a consent form.
: Not applicable.
: The authors declare that they have no competing interests.