Received: 18 September 2017
Accepted: 26 April 2018
First Online: 21 May 2018
Ethics approval and consent to participate
: Study protocol was approved by the Ethical Review Board of School of Pharmacy, College of Health Sciences, Addis Ababa University. Individual verbal informed consent was obtained from all adult participants and the parents or guardians of all children who participated in the study following adequate explanation about the purpose of the study.
: The authors declare that they have no competing interests.
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