作者单位:Tulane Univ, Sch Med, New Orleans, LA 70112 USA[1]Childrens Hosp Philadelphia, Div Crit Care Med, Philadelphia, PA 19004 USA[2]Childrens Hosp Philadelphia, Div Emergency Med, Philadelphia, PA 19004 USA[3]Childrens Hosp Philadelphia, Ctr Simulat Innovat & Adv Educ, Philadelphia, PA 19004 USA[4]