[1] Univ Texas, SW Med Ctr, Dept Anesthesiol & Pain Management, Dallas, TX 75216 USA
[2] Rigshosp, Juliane Marie Ctr, Sect Surg Pathophysiol, DK-2100 Copenhagen, Denmark
[3] Virginia Mason Med Ctr, Dept Anesthesia, Seattle, WA 98101 USA
[4] McGill Univ, Ctr Hlth, Dept Anesthesia, Montreal, PQ H3A 2T5, Canada
[5] Tufts Univ, New England Med Ctr, Dept Anesthesia, Boston, MA 02111 USA
[6] Javelin Pharmaceut, Cambridge, MA USA