[1] Univ Utah, Dept Pediat, Div Crit Care, Salt Lake City, UT 84112 USA
[2] Univ Utah, Div Epidemiol, Qualitat Res Core, Sch Med, Salt Lake City, UT 84112 USA
[3] VA Salt Lake City Hlth Care Syst, Informat Decis Enhancement & Analyt Sci Ctr Innov, Salt Lake City, UT USA
[4] Childrens Hosp Philadelphia, Dept Anesthesiol & Crit Care Med, Philadelphia, PA 19104 USA
[5] Univ Colorado, Sch Med, Childrens Hosp Colorado, Dept Pediat,Crit Care Med, Aurora, CO USA
[6] Univ Washington, Sch Med, Dept Pediat, Pediat Crit Care Med, Seattle, WA 98195 USA
[7] Seattle Childrens Res Inst, Ctr Child Hlth Behav & Dev, Seattle, WA USA
[8] UPMC Childrens Hosp Pittsburgh, Div Pediat Crit Care Med, Pittsburgh, PA USA