Robert C. Doebele, University of Colorado (IMAGE) University of Colorado Anschutz Medical Campus Caption Robert C. Doebele, MD, PhD, and colleagues find resistance mechanisms in ALK+ and ROS1+ lung cancers, and demonstrate use to circulating tumor DNA to search for these mechanisms in patient samples. 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.