Received: 11 February 2020
Accepted: 11 May 2020
First Online: 20 May 2020
Ethics approval and consent to participate
: The study protocol as well as other study materials were reviewed and approved by the Nigerian Institute of Medical Research Institutional Review Board IRB/19/024. Participants were required to sign an informed consent form while information obtained from the participants were treated as confidential and personal identifiers were not used.
: Not applicable.
: The Authors declare that no competing interest exists.