Received: 20 March 2019
Accepted: 4 June 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: The ethical review committee of the University of Fort Hare, South Africa (Reference number: GONO11) and Ondo State Health Research Ethics Committee, Ondo State, Nigeria (Reference number: NHREC/18/08/2016), approved the study protocol. Written consent was obtained from all participants. For the few participants (n = 55) included in this study who were aged 17 years at the time of the study, assent and parental consent were obtained before their participation. We explained the study objectives and use of information obtained to all participants. Also, participants were told that they were free to skip any question they were not comfortable answering or stop the interview at any time. Anonymity, confidentiality, and privacy were ensured throughout the study.
: Not applicable.
: XAI is an associated editor with BMC public health. All authors have no competing interest.