SITC fellows (IMAGE) Johns Hopkins Medicine Caption Suzanne Topalian, M.D., and Drew Pardoll, M.D., Ph.D. Credit The Johns Hopkins Kimmel Cancer Center Usage Restrictions -- 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.