Article Info AuthorsDr.Abdullah Bashir Said Al ManjiDr.Mohamed Nageeb AbdallaDr.Sami Saeed Saeed AlMudarraVolume: 26Year: 2019Month: JanuaryIssue: 1-4Reference: Manji AB., Abdalla M., AlMudarra S., .Saudi Epidemiology Bulletin. 2019;26(1-4):.