Text and Data Mining valid from 2020-02-11
Received: 16 August 2019
Accepted: 4 February 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Research and Publication Committee of the Muhimbili University of Health and Allied Sciences and permission was obtained from the Kibiti district council. Informed consent forms signed by parents or guardians of study participants were obtained before commencing the study. For confidentiality purposes, each participant was assigned an identification number instead of his/her name.
: Not applicable.
: The authors declare no conflict of interest.