[1] Univ Utah, Dept Pediat, Div Inpatient Med, Primary Childrens Hosp, Salt Lake City, UT 84113 USA
[2] Northwestern Univ, Feinberg Sch Med, Dept Pediat, Chicago, IL 60611 USA
[3] Northwestern Univ, Feinberg Sch Med, Div Pediat Emergency Med, Chicago, IL 60611 USA
[4] Ann & Robert H Lurie Childrens Hosp Chicago, Chicago, IL USA
[5] Yale Univ, Sch Med, Dept Pediat, Sect Emergency Med, New Haven, CT 06510 USA
[6] NYU, Sch Med, Dept Pediat, Bellevue Hosp, New York, NY USA
[7] Univ Kansas, Med Ctr, Dept Pediat, Kansas City, KS 66103 USA
[8] Univ Penn, Dept Pediat, Perelman Sch Med, Philadelphia, PA 19104 USA
[9] Johns Hopkins Univ, Sch Med, Dept Pediat, Baltimore, MD 21205 USA