Received: 7 January 2020
Accepted: 16 October 2020
First Online: 23 October 2020
Ethics approval and consent to participate
: The study was approved by the University of Buea Institutional Review Board (No. 2016-05-0523). Administrative approvals were obtained from the Buea Regional Delegation of Public Health, and the study host institutions. Written informed consent was obtained from participants ≥21 years. Written assent was obtained from parents/guardians of partcipants < 21 years in addittion to a proxy consent from these partcipants.
: Not applicable.
: The authors declare that they have no competing interests.