[1] Childrens Hosp Philadelphia, Div Emergency Med, Emergency Dept, Philadelphia, PA 19104 USA
[2] Childrens Hosp Philadelphia, Div Gen Pediat, Emergency Dept, Philadelphia, PA 19104 USA
[3] Hosp Univ Penn, Philadelphia, PA 19104 USA
[4] Univ Penn, Sch Med, Dept Pediat, Philadelphia, PA 19104 USA
[5] Univ Penn, Sch Med, Dept Child & Adolescent Psychiat, Philadelphia, PA 19104 USA
[6] Univ Penn, Sch Med, Dept Emergency Med, Philadelphia, PA 19104 USA