[1] UCLA, David Geffen Sch Med, Dept Emergency Med, Harbor UCLA Med Ctr, Torrance, CA 90505 USA
[2] Boston Univ, Sch Med, Dept Emergency Med, Boston Med Ctr, Boston, MA 02118 USA
[3] Res Div, Eatontown, NJ USA
[4] J3Personica, Eatontown, NJ USA
[5] UCSF Sch Med, Dept Emergency Med, Oakland, CA USA
[6] Alameda Hlth Syst Highland Hosp, Oakland, CA USA
[7] Maimonides Hosp, Dept Emergency Med, Brooklyn, NY 11219 USA
[8] Oregon Hlth & Sci Univ, Dept Emergency Med, Portland, OR 97201 USA