[1] Univ Colorado, Sch Med, Dept Emergency Med, Aurora, CO USA
[2] Icahn Sch Med Mt Sinai, Dept Emergency Med, New York, NY USA
[3] Yale Sch Med, Dept Emergency Med, New Haven, CT USA
[4] Univ Rochester, Strong Mem Hosp, Dept Emergency Med, Rochester, NY USA
[5] Contra Costa Hlth Plan, Martinez, CA USA
[6] Univ Colorado Denver, Dept Emergency Med, 12401 East 17th Ave,7th Floor, Aurora, CO 80045 USA