Funding for this research was provided by:
Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD073349)
Received: 7 April 2020
Accepted: 21 August 2020
First Online: 1 September 2020
Ethics approval and consent to participate
: Ethics approval and consent was granted by the Institutional Review Board at the Harvard T. H. Chan School of Public Health under IRB Protocol 15145 and received in-country ethics approval by the Sierra Leone Ethics and Scientific Review Committee.
: Not applicable.
: The authors declare that they have no competing interests.