Stephen Esper, M.D. (IMAGE) University of Pittsburgh Caption Stephen Esper, M.D., associate professor of anesthesiology and perioperative medicine at the University of Pittsburgh and director of the UPMC Center for Perioperative Care Credit UPMC Usage Restrictions For use only in reporting on this study License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.