John Sampson and Kristen Batich (IMAGE) Duke University Medical Center Caption John Sampson, M.D., Ph.D., chair of Duke's Department of Neurosurgery, works with lead author Kristen Batich, M.D., Ph.D., on a previous study in this file photo from Duke Health. Credit Shawn Rocco, Duke Health Usage Restrictions Credit Shawn Rocco, Duke Health License Licensed 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.