[1] Rush Univ, Dept Emergency Med, Med Ctr, Chicago, IL USA
[2] 1750 West Harrison St,Suite 108 Kellogg, Chicago, IL 60612 USA
[3] Rush Univ, Dept Hlth Syst Management, Chicago, IL USA
[4] Rush Univ, Ctr Qual Safety & Value Analyt, Med Ctr, Rush Hlth, Chicago, IL USA
[5] Rush Univ, Dept Internal Med, Div Pulm Crit Care & Sleep Med, Med Ctr, Chicago, IL USA