USF Researchers (IMAGE) University of South Florida (USF Health) Caption David Keefe, M.D., (left) and Lin Liu, Ph.D., of the University of South Florida College of Medicine. Credit Photo by Eric Younghans Usage Restrictions Use with appropriate caption. 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.