[1] Univ Texas Southwestern Med Ctr Dallas, Dept Anesthesiol & Pain Management, Dallas, TX 75390 USA
[2] Univ Pittsburgh, Dept Anesthesiol & Perioperat Med, Pittsburgh, PA USA
[3] Emory Univ, Dept Anesthesiol, Atlanta, GA 30322 USA
[4] Vanderbilt Univ, Dept Anesthesiol, 221 Kirkland Hall, Nashville, TN 37235 USA
[5] Univ Southern Calif, Keck Sch Med, LAC USC Med Ctr, Dept Anesthesiol, Los Angeles, CA 90007 USA
[6] Accreditat Council Grad Med Educ, Chicago, IL USA
[7] Med Coll Wisconsin, Dept Anesthesiol, Milwaukee, WI 53226 USA
[8] Mayo Clin, Dept Anesthesiol & Perioperat Med, Rochester, MN USA
[9] Cleveland Clin, Inst Anesthesiol, Cleveland, OH 44106 USA
[10] Cleveland Clin, Dept Anesthesiol & Pain Management, Cleveland, OH 44106 USA
[11] OrthoSouth Crosstown Back & Pain Inst, Kansas Hlth Sci Ctr, Wichita, KS USA
[12] Pediat Specialists Virginia, Fairfax, VA USA
[13] Cleveland Clin, Womens Hlth Inst, Cleveland, OH 44106 USA
[14] Harvard Med Sch, Beth Israel Deaconess Med Ctr, Dept Anesthesia Crit Care & Pain Med, Boston, MA 02115 USA