[1] Beni Suef Univ, Publ Hlth & Community Med Dept, Fac Med, Bani Suwayf, Egypt
[2] Univ Maryland, Sch Med, Dept Emergency Med, Baltimore, MD 21201 USA
[3] Beni Suef Univ, Dept Gen Surg, Fac Med, Bani Suwayf, Egypt
[4] Jazan Univ, Dept Family & Community Med, Fac Med, Jazan, Saudi Arabia
[5] Ain Shams Univ, Dept Community Environm & Occupat Med, Fac Med, Cairo, Egypt
[6] Ain Shams Univ, Dept Gen Surg, Cairo, Egypt
[7] Univ Maryland, Sch Med, Dept Epidemiol & Publ Hlth, Baltimore, MD 21201 USA