[1] Henry Ford Hosp, Dept Emergency Med, Detroit, MI 48202 USA
[2] Loma Linda Univ, Dept Emergency Med, Loma Linda, CA 92350 USA
[3] Univ Pittsburgh, Dept Crit Care Med, Pittsburgh, PA USA
[4] Univ Penn, Dept Emergency Med, Philadelphia, PA 19104 USA
[5] Virginia Commonwealth Univ, Med Ctr, Dept Anesthesiol Crit Care Med, Richmond, VA USA
[6] Cooper Univ Hosp, Dept Emergency Med, Sect Crit Care Med, Camden, NJ 08103 USA
[7] Wayne State Univ, Detroit Receiving Hosp, Dept Emergency Med, Detroit, MI USA
[8] Washington Univ, Barnes Jewish Hosp, Dept Emergency Med, St Louis, MO USA
[9] Univ Virginia, Dept Emergency Med, Charlottesville, VA USA