Received: 31 July 2018
Accepted: 7 January 2019
First Online: 14 January 2019
Ethics approval and consent to participate
: The University of Zambia Biomedical Research Ethics Committee, University of North Carolina at Chapel Hill Institutional Review Board and the Zambian Ministry of Health approved the study. The study was conducted in accordance with the principles of the Declaration of Helsinki and in compliance with good clinical practice guidelines and is registered at ClinicalTrials.gov with registration number NCT01886833. Written informed consent was obtained from all mothers of participating infants.
: Not applicable
: The authors declare that they have no competing interests.
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