David Keeling, University of Leeds (IMAGE) University of Leeds Caption Ph.D. student David Keeling with the web material that will be used in the development of the heart assist device. Credit Simon & Simon Photography 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.