Werren and Martinson (IMAGE) University of Rochester Caption Prof. John (Jack) Werren and Ellen Martinson, postdoctoral research associate, are in their lab. Credit Photo by J. Adam Fenster/University of Rochester Usage Restrictions credit Adam Fenster/University of Rochester 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.