Funding for this research was provided by:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Instituto Evandro Chagas, Health Surveillance Secretariat, Brazilian Ministry of Health
National Council for the Development of Science
National Council for the Development of Science (CNPq).
Text and Data Mining valid from 2019-06-12
Received: 9 November 2018
Accepted: 14 May 2019
First Online: 12 June 2019
Ethics approval and consent to participate
: The study was approved by the Independent Ethics Committee of the Instituto Evandro Chagas, Health Surveillance Secretariat, Brazilian Ministry of Health (protocol 0039/2011), and was conducted in accordance with the principles of the Declaration of Helsinki, as well as in compliance with the Good Clinical Practice guidelines. Children were recruited for the study after informed written consent was obtained from the parent or guardian.
: Not applicable.
: The authors declare that they have no competing interests.