[1] Christiana Care Hlth Syst, Dept Emergency Med, Newark, DE USA
[2] Thomas Jefferson Univ, Jefferson Med Coll, Philadelphia, PA 19107 USA
[3] Mt Sinai Med Ctr, Dept Emergency Med, New York, NY 10029 USA
[4] Icahn Sch Med Mt Sinai, New York, NY USA
[5] Univ Wisconsin, Sch Med & Publ Hlth, Div Emergency Med, Madison, WI USA
[6] Care Point PC, Sky Ridge Med Ctr, Dept Emergency Med, Denver, CO USA
[7] Catholic Med Ctr, Manchester, NH USA
[8] Emergency Med Associates PA PC, Germantown, MD USA
[9] Barnes Jewish Hosp, Div Emergency Med, St Louis, MO 63110 USA
[10] Washington Univ, Sch Med, St Louis, MO USA
[11] Einstein Med Ctr Philadelphia, Dept Emergency Med, Philadelphia, PA USA
[12] Univ Nebraska Med Ctr, Dept Emergency Med, Omaha, NE USA
[13] Summa Akron City Hosp, Dept Emergency Med, Akron, OH USA
[14] Northeastern Ohio Med Univ, Rootstown, OH USA
[15] Cleveland Clin, Emergency Serv & Qual Inst, Cleveland, OH 44106 USA
[16] Cleveland Clin, Patient Safety Inst, Cleveland, OH 44106 USA
[17] Case Western Reserve Univ, Cleveland Clin, Lerner Coll Med, Cleveland, OH 44106 USA
[18] HCA Continental Div, Denver, CO USA
[19] George Washington Univ, Ctr Hlth Care Qual, Washington, DC USA
[20] George Washington Univ, Dept Emergency Med, Washington, DC USA
[21] George Washington Univ, Dept Hlth Policy, Washington, DC USA