Received: 10 September 2018
Accepted: 15 January 2019
First Online: 22 January 2019
Ethics approval and consent to participate
: Permission to conduct the study was requested and granted from Muhimbili national hospital after review and approval by Institutional Review Board of Muhimbili University of Health and Allied Science (MUHAS). Written informed consent was sought from all patients, and child assent and parental permission sought prior to enrollment into the study.
: Not applicable.
: The authors declare no conflicts of interest.
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