Article History
Received: 14 August 2019
Accepted: 18 December 2019
First Online: 30 January 2020
Compliance with ethical standards
:
: All procedures performed in the study were approved by the Research Ethics Committee of the University of Port Harcourt, Nigeria (UPH/R&DD/REC/04). The research was also conducted in accordance with the Helsinki Declaration.
: Informed consent was obtained from all individual participants before they were enrolled in the study.