Article Info Authors Dr.Nagham Khalid AbdulMatloupDr.Abdul Jamil ChoudhryDr.Mohammed AbdulAziz Al-Mazroa Volume: 19 Year: 2012 Month: April Issue: 2 Pages: Reference: AbdulMatloup N., Choudhry A., Al-Mazroa M., .Saudi Epidemiology Bulletin. 2012;19(2):.