Received: 1 October 2020
Accepted: 17 February 2021
First Online: 2 March 2021
Ethics approval and consent to participate
: This study was approved by the ethics committee of Federal Medical Centre Asaba with approval number FMC/ASA/A90. Written informed consent was obtained from parents or guardian before the commencement of the study
: Approval for publication was granted.
: No competing interest