[1] Univ Colorado, Dept Emergency Med, Aurora, CO USA
[2] Univ Colorado, Colorado Sch Publ Hlth, Dept Epidemiol, Anschutz Med Campus, Aurora, CO USA
[3] Univ N Carolina, Sch Med, Chapel Hill, NC 27515 USA
[4] Bassett Res Inst, Cooperstown, NY USA
[5] Columbia Univ Coll Phys & Surg, Dept Psychiat, 722 W 168th St, New York, NY 10032 USA
[6] Columbia Univ, Mailman Sch Publ Hlth, Dept Biostat, New York, NY USA
[7] Columbia Univ, Mailman Sch Publ Hlth, Dept Epidemiol, New York, NY USA
[8] Univ Calif San Diego, Dept Family Med & Publ Hlth, La Jolla, CA 92093 USA
[9] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Hlth Behav & Soc, Baltimore, MD USA
[10] Univ Michigan, Transportat Res Inst, Ann Arbor, MI 48109 USA
[11] Ctr Adv Transportat Leadership & Safety ATLAS Ctr, Ann Arbor, MI USA
[12] Columbia Univ, Vagelos Coll Phys & Surg, Dept Anesthesiol, New York, NY 10032 USA