Sana Karam, MD, PhD (IMAGE) University of Colorado Anschutz Medical Campus Caption Sana Karam, MD, PhD, and colleagues show that depleting treg cells may increase the effectiveness of anti-cancer immunotherapies. Credit University of Colorado Cancer Center 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.