[1] St Christophers Hosp, Pediat Emergency Dept, Dept Pediat, Philadelphia, PA USA
[2] Alexandria Univ, Fac Med, Alexandria, Egypt
[3] Univ Hama, Fac Med, Hama, Syria
[4] BronxCare Hlth Syst, Bronx, NY USA
[5] Cairo Univ, Kasralainy Sch Med, Cairo, Egypt
[6] Harbin Med Univ, Harbin, Peoples R China
[7] Al Quds Univ, Fac Med, Jerusalem, Palestine
[8] Drexel Univ, Coll Med, Philadelphia, PA USA
[9] St Christophers Hosp Children, Pediat Emergency Med Fellowship, Philadelphia, PA USA