Kellen Chen (IMAGE) University of Arizona Health Sciences Caption Kellen Chen, PhD, is an assistant research professor of surgery in the UArizona College of Medicine – Tucson and a member of the UArizona Cancer Center. Credit UArizona Health Sciences Usage Restrictions Credit UArizona Health Sciences 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.