[1] Childrens Mercy Hosp, Dept Pediat, Div Hosp Med, 2401 Gillham Rd, Kansas City, MO 64108 USA
[2] Univ Missouri, Dept Pediat, Kansas City, MO 64108 USA
[3] Yale Sch Med, Dept Pediat, Sect Pediat Emergency Med, 100 York St,Suite 1F, New Haven, CT 06511 USA