[1] Texas Tech Univ, Dept Emergency Med, Hlth Sci Ctr, El Paso, TX USA
[2] Yale Univ, Dept Emergency Med, New Haven, CT USA
[3] Yale Univ, Sch Publ Hlth, New Haven, CT USA
[4] Brown Univ, Rhode Isl Hosp, Dept Emergency Med, Providence, RI 02903 USA
[5] Brown Univ, Dept Community Hlth, Warren Alpert Med Sch, Providence, RI 02903 USA
[6] Johns Hopkins Sch Med, Dept Emergency Med, Baltimore, MD USA
[7] Natl Alcohol Res Grp, Inst Publ Hlth, Berkeley, CA USA
[8] Univ Maryland, Dept Emergency Med, Baltimore, MD 21201 USA
[9] Denver Hlth Med Ctr, Dept Emergency Med, Denver, CO USA
[10] Ctr Dis Control & Prevent, Natl Ctr Injury Prevent & Control, Atlanta, GA USA