[1] Med Coll Wisconsin, Dept Anesthesiol, 9200 W Wisconsin Ave, Milwaukee, WI 53226 USA
[2] Univ Southern Calif, Dept Anesthesiol & Crit Care, Keck Sch Med, Los Angeles, CA USA
[3] Univ Maryland, Dept Anesthesiol, Div Trauma Anesthesiol, Sch Med,R Adams Cowley Shock Trauma Ctr, Baltimore, MD 21201 USA
[4] Univ Maryland, Dept Anesthesiol, Div Surg Crit Care, Sch Med,R Adams Cowley Shock Trauma Ctr, Baltimore, MD 21201 USA
[5] Univ Washington, Harborview Med Ctr, Dept Anesthesiol & Pain Med, 325 9Th Ave, Seattle, WA 98104 USA
[6] Univ Washington, Harborview Med Ctr, Dept Orthoped Surg & Sport Med, 325 9Th Ave, Seattle, WA 98104 USA
[7] Univ Washington, Harborview Med Ctr, Dept Neurol Surg Adj, 325 9Th Ave, Seattle, WA 98104 USA
[8] UT MD Anderson Canc Ctr, Div Anesthesiol & Crit Care, Houston, TX USA
[9] Quinnipiac Univ, Frank H Netter MD Sch Med, Dept Anesthesiol, Univ Connecticut,Sch Med, Hartford, CT USA
[10] Baylor Coll Med, Cardiothorac Anesthesia, Texas Heart Inst, Houston, TX 77030 USA
[11] Brigham & Womens Hosp, Dept Anesthesiol Perioperat & Pain Med, 75 Francis St, Boston, MA 02115 USA
[12] Univ Miami, Miller Sch Med, Dept Anesthesiol, Ryder Trauma Ctr,Jackson Mem Hosp, Miami, FL 33136 USA