Article Info Authors Dr.Ibraheem Mohammed Ali Al-NahellahDr.Salem Hamed Saif Al-BusaidiDr.Faisal Mossa Ahmad MashragiDr.Abdul Jamil ChoudhryDr.Mohamed Nageeb AbdallaDr.Abdullah Mohammed Al-Saigul Dr. Mohammad Abu Baker. Volume: 20 Year: 2013 Month: January Issue: 1-4 Pages: Reference: Al-Nahellah I., Al-Busaidi S., Mashragi F., Choudhry A., Abdalla M., Al-Saigul A.,Dr. Mohammad Abu Baker. .Saudi Epidemiology Bulletin. 2013;20(1-4):.