Complex Coordination (IMAGE) University of Pennsylvania School of Medicine Caption This is a thickened heart wall due to loss of Hdac2-Hopx function. Credit Jon Epstein, MD, University of Pennsylvania School of Medicine 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.