Received: 2 August 2019
Accepted: 6 February 2020
First Online: 12 February 2020
Ethics approval and consent to participate
: The ethical approval for the study was obtained from the Senate Research and Publication Committee, the Institutional Review Board of Muhimbili University of Health and Allied Sciences (MUHAS). Permission to conduct the study was obtained from Region Health Management and Hospital Management. Written informed consent was obtained from each participant/guardian before enrolment. The identification number was employed and only authorized personnel had access to data.
: Not applicable.
: The authors declare that they have no competing interests.