Received: 3 July 2019
Accepted: 18 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from the Department of Pediatrics and Child Health Research and Publications Committee of the School of Medicine, College of Health Sciences, Addis Ababa University and it was a written consent. Written Consent was obtained from parents or guardian on behalf of any minor participants.
: Not required.
: The authors declare that they have no competing interests.