Article Info AuthorsDr.Salem Hamed Saif Al-BusaidiProf.Ashry Gad MohammedDr.Abdullah Gainan AlzahraniVolume: 19Year: 2012Month: JulyIssue: 3Reference: Al-Busaidi S., Mohammed A., Alzahrani AG., .Saudi Epidemiology Bulletin. 2012;19(3):.