Received: 12 October 2018
Accepted: 11 November 2019
First Online: 25 November 2019
Ethics approval and consent to participate
: This study was done according to the guidelines laid down in the Declaration of Helsinki. The protocol to conduct the study was approved by Muhimbili University of Health and Allied Sciences (MUHAS) institutional review board with reference number MU/PGS/SAEC/VOL XVI/. Permission to conduct the study was obtained from Morogoro region, Ifakara Town Council and local administrative authorities. A written informed consent for participation on voluntary basis was used to recruit participants. Participants signed or used a thumbprint to indicate consent.
: Not applicable.
: The authors declare that they have no competing interests.