Postoperative Neurocognitive Dysfunction in Elderly Patients after Xenon versus Propofol Anesthesia for Major Noncardiac Surgery: A Double-blinded Randomized Controlled Pilot Study: Retraction

The article by Höcker et al., entitled “Postoperative Neurocognitive Dysfunction in Elderly Patients after Xenon versus Propofol Anesthesia for Major Noncardiac Surgery: A Double-blinded Randomized Controlled Pilot Study,” from the May 2009 issue of Anesthesiology, has been retracted by agreement between the Journal Editor-in-Chief, James C. Eisenach, M.D., the authors, and Wolters Kluwer. This article is being retracted because we are informed by the Research Ethics Committee Chairman that the Committee was not informed that the protocol and sample size had been changed after approval, nor that the study had finished, both of which were required by the Committee.