Received: 17 January 2019
Accepted: 16 September 2019
First Online: 10 October 2019
Ethics approval and consent to participate
: This paper has been submitted with full responsibility, following the due ethical procedure of the Lagos University Teaching Hospital Human Research and Ethics committee, which was approved on 23 April 2014 (ADM/DCST/HREC/1757). There is no duplicate publication, fraud, plagiarism, or concern about animal or human experimentation.Consent to participate in the study was obtained from the parent or legal guardians of the participants at clinic appointment after consultation, as they were all under 18 at the time of the study.
: Not applicable.
: The authors declare that they have no competing interests.