David Lieberman MD, is Professor of Medicine and Chief of the Division of Gastroenterology and Hepatology at Oregon Health and Science University (OHSU) in Portland, Oregon and the Portland VA Medical Center. Dr. Lieberman is internationally recognized as an expert on colon cancer screening. He is Chairman for VA Cooperative Study # 380, which utilized colonoscopy to screen asymptomatic subjects for colorectal cancer with publications in New England Journal of Medicine, JAMA, Annals of Internal Medicine and Gastroenterology. Dr. Lieberman was the Chairman of the Multi-Society Task Force on Colorectal Cancer (2006-2012), and authored colon cancer screening recommendations in 2008 (CA and Gastroenterology) as well as colonoscopy quality indicators in 2007, review of colorectal cancer screening (JAMA 2016), and recommendations for polyp surveillance (2012 and 2020). He was the Director of the Clinical Outcomes Research Initiative (CORI), supported by NIH 1999-2016. The project created a national endoscopic data repository for research, with more than 90 peer-reviewed publications to date. Previously, Dr. Lieberman served as a member of the National Commission on Digestive Diseases from 2006-2008, President of the American Society for Gastrointestinal Endoscopy (ASGE) in 2001-2002, and Associate Editor of Gastroenterology (2011-2013). He was the Clinical Research Councilor on the board of the American Gastroenterological Association (AGA), and presidential officer from 2016-2020. He was President of the AGA Institute (2018-2019) and AGA (2019-2020). He has been an advisor to the President’s Cancer Panel (2020-2021).