1. From the Department of Anaesthesia, Waikato District Health Board, Hamilton, New Zealand (L.J.V.); the Department of Anesthesiology, Emory University School of Medicine, Atlanta, Georgia (P.S.G); Anesthesiology and Research Divisions, Atlanta Veterans Administration Medical Center, Atlanta, Georgia (P.S.G.); the Experimental Anesthesiology Section, Department of Anesthesiology, University Hospita