[1] Univ Colorado, Sch Med, Dept Pediat, Sect Pediat Emergency Med, Aurora, CO 80045 USA
[2] Oregon Hlth & Sci Univ, Dept Emergency Med, Portland, OR USA
[3] Med Coll Wisconsin, Dept Emergency Med, Milwaukee, WI 53226 USA
[4] Med Coll Wisconsin, Dept Pediat, 8701 Watertown Plank Rd, Milwaukee, WI 53226 USA
[5] Univ Calif San Diego, Dept Emergency Med, San Diego, CA 92103 USA
[6] Univ Calif San Diego, Dept Pediat, San Diego, CA 92103 USA
[7] Harbor UCLA Med Ctr, Dept Emergency Med, Torrance, CA 90509 USA
[8] Tennessee Disabil Coalit, Nashville, TN USA
[9] George Washington Univ, Sch Med, Dept Emergency Med, Washington, DC USA
[10] Childrens Natl Med Ctr, Washington, DC 20010 USA
[11] Univ Arizona, Sch Med, Dept Emergency Med, Tucson, AZ USA
[12] Univ Utah, Sch Med, Dept Pediat, Div Pediat Crit Care, Salt Lake City, UT USA