Article Info Authors Dr.Ali Ahmed ThebanDr.Sami Saeed Saeed AlMudarraDr.Ahmad Mohammad Al-Asmari Volume: 25 Year: 2018 Month: January Issue: 1-4 Pages: Reference: Theban A., AlMudarra S., Al-Asmari A., .Saudi Epidemiology Bulletin. 2018;25(1-4):.