Funding for this research was provided by:
UNICEF Sierra Leone (43144788)
Received: 2 September 2016
Accepted: 1 June 2018
First Online: 15 June 2018
Ethics approval and consent to participate
: Ethical approval was granted by Ethics Committee of LSTM and the Sierra Leone Ethics and Scientific Review Committee. The Sierra Leone Ministry of Health and Sanitation also approved the study. All participants provided written informed consent following verbal and written explanations of the study.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.