Funding for this research was provided by:
Bill and Melinda Gates Foundation (WO-Grand Challenges Brazil: All Children Thriving, OPP1142172)
Received: 16 August 2017
Accepted: 2 August 2018
First Online: 9 August 2018
Ethics approval and consent to participate
: We have different consent form given to participants (parents or guardians); one consent form before and another after randomization for all participants. This project was approved by the Research Ethics Committee of the Hospital de Clinicas of Porto Alegre (GPPG 150606;CAAE 508306115000005327.
: Not applicable.
: The authors declare that have no competing of interests.
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