Funding for this research was provided by:
Federal Government of Nigeria Postgraduate Scholarship Award (FSBA/FGSS/18/PG/015)
Received: 14 January 2020
Accepted: 22 October 2020
First Online: 3 November 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from the Delta State Ministry of Health Research Ethics Committee, Asaba, Nigeria (HM/596/T/55). Only participants who read, understood and signed the informed consent form were allowed to take part in the study.
: Not applicable.
: The authors declare that they have no competing interests.