[1] Our Lady Lourdes Med Ctr, Dept Emergency Med, Camden, NJ 08103 USA
[2] St Joseph Mercy Hosp, Sect Pediat Emergency Med, Dept Emergency Med, Ann Arbor, MI 48104 USA
[3] Sinai Hosp, Sect Pediat Emergency Med, Dept Emergency Med, Baltimore, MD 21215 USA
[4] K Hovnanian Childrens Hosp, Dept Emergency Med, Neptune, NJ USA
[5] Hosp Univ Penn, Dept Emergency Med, Philadelphia, PA 19104 USA