Robert W. Carlson, MD (IMAGE) National Comprehensive Cancer Network Caption Robert W. Carlson, MD, announces his upcoming retirement from the National Comprehensive Cancer Network (NCCN) after more than ten years as Chief Executive Officer. Learn more at NCCN.org. Credit NCCN Usage Restrictions For media coverage use only. 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.