Article Info Authors Dr.Turki moghli hammad AlaslaniDr.Shady Abdulrahman KamelDr.Amal Al Nafisi Volume: 24 Year: 2017 Month: January Issue: 1-4 Pages: Reference: Alaslani T., Kamel S., Nafisi A., .Saudi Epidemiology Bulletin. 2017;24(1-4):.