*Corresponding author: Donath Samuel Tarimo, United Nations Road, P.O.Box 65015, Dar es Salaam, United Republic of Tanzania. Tels: +255 754 820 439 (BS Ng`weng`weta); +255 754 578 528 (TD Samuel)… Click to show full abstract
*Corresponding author: Donath Samuel Tarimo, United Nations Road, P.O.Box 65015, Dar es Salaam, United Republic of Tanzania. Tels: +255 754 820 439 (BS Ng`weng`weta); +255 754 578 528 (TD Samuel) E-mails: [email protected] (BS Ng`weng`weta); [email protected] (TD Samuel) The study protocol was performed according to the Helsinki declaration and approved by the Institutional Review Board of the Muhimbili University of Health and Allied Sciences. Informed verbal and written consent for participation in the survey was obtained from each participant. The journal implements double-blind peer review practiced by specially invited international editorial board members.
               
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