Prof. Heinz-Josef Lenz (IMAGE) European Society for Medical Oncology Caption Study author Prof. Heinz-Josef Lenz, Co-Leader, Gastrointestinal Cancers Program, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, US. Credit © European Society for Medical Oncology Usage Restrictions To be used with the appropriate caption or credit 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.