Gang Han, PhD, UMass Medical School (IMAGE) UMass Chan Medical School Caption This is Gang Han, PhD, associate professor of biochemistry & molecular pharmacology at University of Massachusetts Medical School. Credit UMass Medical School Usage Restrictions The image may only be used with appropriate caption and 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.