[1] Univ Toronto, Univ Hlth Network, Toronto Western Hosp, Dept Anesthesiol, 399 Bathurst St,McL 2-405, Toronto, ON M5T 2S8, Canada
[2] Weill Cornell Med Coll & Hosp Special Surg, Dept Anesthesiol, New York, NY USA
[3] Univ Michigan, Dept Anesthesiol, Ann Arbor, MI 48109 USA
[4] Western Univ, St Josephs Hosp, Univ Hosp, Dept Anesthesiol & Perioperat Med, London, ON, Canada
[5] Western Univ, Victoria Hosp, London Hlth Sci Ctr, London, ON, Canada
[6] Western Univ, St Josephs Hlth Care, London, ON, Canada
[7] Paracelsus Med Univ, Dept Anesthesiol Perioperat Med & Intens Care, Salzburg, Austria
[8] Hosp Special Surg, Weill Cornell Med Coll, Dept Anesthesiol, 535 E 70th St, New York, NY 10021 USA
[9] Paracelsus Med Univ, Dept Anesthesia Perioperat Med & Intens Care, Salzburg, Austria
[10] Univ Calif San Diego, Dept Med, San Diego, CA 92103 USA
[11] Sparrow Hosp, Lansing, MI USA
[12] Univ Texas Southwestern Med Sch, Dept Anesthesiol & Pain Management, Dallas, TX USA
[13] Univ British Columbia, Dept Med, Div Resp Med, Vancouver, BC, Canada
[14] Univ British Columbia, Vancouver, BC, Canada
[15] Emory Univ, Dept Med, Atlanta, GA 30322 USA
[16] Stanford Univ, Med Ctr, Dept Anesthesiol Perioperat & Pain Med, Palo Alto, CA 94304 USA
[17] Harvard Univ, Dept Anesthesia Crit Care & Pain Med, Cambridge, MA 02138 USA
[18] Univ Toronto, Univ Hlth Network, Lib & Informat Serv, Toronto, ON, Canada
[19] Mayo Clin, Dept Anesthesiol, Rochester, MN USA
[20] Mayo Clin, Dept Pulm Crit Care & Sleep Med, Rochester, MN USA
[21] Univ Peruana Ciencias Aplicadas UPC, Sch Med, Lima, Peru
[22] Cleveland Clin, Lerner Coll Med, Dept Hosp Med, Cleveland, OH 44106 USA
[23] Cleveland Clin, Lerner Coll Med, Dept Outcomes Res, Inst Anesthesiol, Cleveland, OH 44106 USA
[24] USC, Keck Sch Med, Caruso Dept Otolaryngol Head & Neck Surg, Los Angeles, CA USA
[25] Univ Calif San Diego, Div Pulm & Crit Care Med, San Diego, CA 92103 USA
[26] Univ Chicago, Sect Pulm & Crit Care, Chicago, IL 60637 USA
[27] Univ Arizona, Dept Pulm Allergy Crit Care & Sleep Med, Tucson, AZ USA
[28] Johns Hopkins Univ, Dept Anesthesiol & Crit Care Med, Baltimore, MD USA
[29] Univ Witten Herdecke, Dept Anaesthesiol & Intens Care Med, Cologne, Germany
[30] Cologne Med Ctr, Dept Paediat Anaesthesia, Cologne, Germany
[31] Univ Western Australia, Sir Charles Gairdner Hosp, Dept Pulm Physiol & Sleep Med, Nedlands, WA, Australia
[32] Case Western Reserve Univ, Sch Med, MetroHlth Med Ctr, Div Pulm Crit Care & Sleep Med, Cleveland, OH USA