researcher (IMAGE) Rice University Caption Di Ao is an assistant professor and postdoctoral associate at the Institute of Medical Research at Northwestern Polytechnical University, China. Credit (Photo courtesy of Di Ao/Rice University) Usage Restrictions Must credit Di Ao/Rice University. License Original 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.