[1] Univ Cincinnati, Coll Med, Dept Anesthesiol, 231 Albert Sabin Way,Suite 3502, Cincinnati, OH 45267 USA
[2] Med Univ South Carolina, Dept Anesthesia & Perioperat Med, Charleston, SC USA
[3] MedStar Washington Hosp Ctr, Dept Anesthesiol, Washington, DC USA
[4] Duke Univ, Med Ctr, Dept Anesthesiol, Durham, NC USA
[5] Columbia Univ, Dept Anesthesiol, New York, NY USA
[6] Johns Hopkins Univ, Sch Med, Dept Anesthesiol & Crit Care Med, Baltimore, MD USA
[7] Yale Sch Med, Dept Anesthesiol, New Haven, CT USA
[8] VA Connecticut Hlth Care Syst, West Haven, CT USA
[9] Stanford Univ, Dept Anesthesiol Perioperat & Pain Med, Stanford, CA 94305 USA
[10] Weill Cornell Med Coll, Psychopharmacol Clin, New York, NY 10021 USA
[11] Hosp Special Surg, Weill Cornell Med Coll, Dept Anesthesiol, New York, NY USA
[12] Vanderbilt Univ, Med Ctr, Dept Anesthesiol, 1211 Med Ctr Dr, Nashville, TN 37232 USA
[13] Missoula Anesthesiol, Dept Anesthesiol, Missoula, MT USA
[14] Int Heart Inst Montana, Missoula, MT USA