[1] Univ Michigan, Injury Res Ctr, Dept Emergency Med, Ann Arbor, MI 48106 USA
[2] Univ Michigan, Dept Psychiat, Ann Arbor, MI 48106 USA
[3] Hurley Med Ctr, Flint, MI USA
[4] George Washington Univ, Ctr Injury Prevent, Washington, DC USA
[5] Brown Univ, Rhode Isl Hosp, Injury Prevent Ctr, Dept Emergency Med,Alpert Med Sch, Providence, RI 02903 USA
[6] Brown Univ, Rhode Isl Hosp, Injury Prevent Ctr, Dept Community Hlth,Alpert Med Sch, Providence, RI 02903 USA
[7] Univ Virginia, Dept Emergency Med, Charlottesville, VA USA
[8] Univ Washington, Harborview Med Ctr, Dept Emergency Med, Seattle, WA 98104 USA
[9] Yale Univ, Dept Emergency Med, New Haven, CT USA