[1] Indiana Univ Sch Med, Dept Pediat, Riley Hosp Children, Div Pediat Crit Care Med,Indiana Univ Hlth, Indianapolis, IN 46202 USA
[2] Yale Univ, Sch Med, Dept Pediat, New Haven, CT 06510 USA
[3] Yale Univ, Sch Med, Dept Emergency Med, New Haven, CT USA
[4] Indiana Univ Sch Med, Indiana Univ Hlth, LifeLine Crit Care Transport, Indianapolis, IN 46202 USA
[5] Indiana Univ Sch Med, Indiana Univ Hlth, Dept Emergency Med, Indianapolis, IN 46202 USA