Received: 26 May 2017
Accepted: 1 March 2018
First Online: 6 March 2018
Ethics approval and consent to participate
: All study participants were clearly informed on the aims and benefits of the study as well as the procedures involved before being enrolled into the study. Written informed consent was obtained before sample collection for adults and for children, their parents or guardian signed the written consent form on their behalf. The study was approved by the Joint Bugando Medical Centre and Catholic University of Health and Allied Sciences Ethical Committee in Mwanza, Tanzania as well as approved by the Ethical Committee Stellenbosch University in Capetown, South Africa.
: Not applicable.
: We declare that we have no competing interest to report.
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