Funding for this research was provided by:
The Bill and Melinda Gates Foundation (Grant 51431)
Received: 13 May 2017
Accepted: 7 September 2017
First Online: 19 September 2017
Ethics approval and consent to participate
: Ethical approval for the study was granted by the Ethics Committee within the Ministry of Health in Benin. Written informed consent to participate in the study was obtained from all volunteers before the commencement of the trial.
: Not applicable.
: The authors declare that they have no competing interests.
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