[1] Vanderbilt Univ, Med Ctr, Dept Emergency Med, Nashville, TN 37235 USA
[2] Vanderbilt Univ, Med Ctr, Div Cardiol, Nashville, TN USA
[3] Wayne State Univ, Dept Emergency Med, Detroit, MI USA
[4] Univ Cincinnati, Med Ctr, Dept Emergency Med, Cincinnati, OH 45267 USA
[5] Brigham & Womens Med Ctr, Div Cardiol, Boston, MA USA
[6] Suny Downstate Med Ctr, Dept Emergency Med, Brooklyn, NY 11203 USA
[7] Indiana Univ, Sch Med, Dept Emergency Med, Indianapolis, IN USA
[8] Indianapolis EMS, Indianapolis, IN USA
[9] Univ Texas Southwestern Med Ctr Dallas, Dept Emergency Med, Dallas, TX 75390 USA
[10] Duke Univ, Med Ctr, Div Cardiol 8, Durham, NC USA
[11] Univ Calif Los Angeles, Div Cardiol, Ronald Reagan Med Ctr, Los Angeles, CA USA
[12] Henry Ford Hosp, Div Cardiol, Detroit, MI 48202 USA
[13] Baylor Univ, Dept Emergency Med, Med Ctr, Houston, TX 77030 USA
[14] Maine Med Ctr, Div Cardiol, Portland, ME 04102 USA
[15] San Francisco VA Med Ctr, Sect Cardiol, San Francisco, CA USA
[16] Univ Calif San Francisco, San Francisco, CA 94143 USA
[17] SUNY Stony Brook, Div Cardiol, Med Ctr, Stony Brook, NY 11794 USA