[1] Univ Vermont, Dept Surg, Larner Coll Med, Div Emergency Med, Burlington, VT 05405 USA
[2] Univ Vermont, Med Ctr, Dept Pharm, Burlington, VT USA
[3] Univ Texas Southwestern Med Ctr Dallas, Dept Emergency Med, Dallas, TX 75390 USA
[4] Brooke Army Med Ctr, Dept Emergency Med, 3841 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA