Funding for this research was provided by:
Ministry of Health and Social Welfare
Received: 7 January 2019
Accepted: 8 July 2019
First Online: 19 July 2019
Ethics approval and consent to participate
: The study was conducted in compliance with Good Clinical Practices and in accordance with the “Declaration of Helsinki.” Ethical clearance to conduct this study was granted by the Research and Publications Ethical Committee of the Muhimbili University of Health and Allied Sciences (MUHAS). Written informed consent for participation in the clinical study and publication of the findings were obtained from all participants. For children, written informed consent for participation and publication of the findings was obtained from their parents/guardians.
: Not applicable.
: The authors declare that they have no competing interests with regards to authorship and/or publication of this paper.