Dr. Laura Porter (IMAGE) National Comprehensive Cancer Network Caption Laura Porter, MD, a member of the NCCN Guidelines Panel for Colorectal Cancer Screening. Credit NCCN Usage Restrictions For media coverage purposes 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.