Article History
Received: 18 February 2019
Accepted: 15 August 2019
First Online: 20 August 2019
Ethics approval and consent to participate
: Ethical approval of the study protocol was granted by the Swaziland Scientific and Ethics Committee, Ministry of Health. All ethical considerations were observed. All participants had consented to participate in the study and signed consent forms.
: Not applicable.
: The authors declare that they have no competing interests.