Received: 23 May 2019
Accepted: 6 September 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: The Sierra Leone Ethics and Scientific Review Committee, Ministry of Health and Sanitation gave ethical approval before the start of the study. Written informed consent was obtained from participant either by signing or thump printing (illiterate participants) the consent form.
: Not applicable.
: The authors declare that they have no competing interests.