Dave Heimbrook, Ph.D., Roche (IMAGE) American Association for Cancer Research Caption Dave Heimbrook, Ph.D., is the global head of discovery oncology at Roche and one of the study authors. Credit Dave Heimbrook, Ph.D. Usage Restrictions None 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.