[1] Ohio State Univ, Dept Emergency Med, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Internal Med, Columbus, OH 43210 USA
[3] Massachusetts Gen Hosp, Dept Emergency Med, Boston, MA 02114 USA
[4] Univ Colorado, Dept Emergency Med, Sch Med, Aurora, CO USA
[5] Brown Univ, Dept Psychiat & Human Behav, Providence, RI 02912 USA
[6] Univ Massachusetts, Sch Med, Dept Emergency Med, Worcester, MA USA
[7] Univ Massachusetts, Sch Med, Dept Psychiat, Worcester, MA 01655 USA
[8] Univ Massachusetts, Sch Med, Dept Quantitat Hlth Sci, Worcester, MA 01655 USA