Dr. Yi-Chia Lee is the clinical professor of Medicine in National Taiwan University and the attending physician of Internal Medicine of National Taiwan University Hospital. He received his M.D. degree at the Medical School of the National Taiwan University. In addition to being a gastroenterologist, Dr. Lee obtained his master’s and doctoral degrees at the Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University. An overriding theme throughout his researches is the GI cancer screening and prevention, with special emphasis on the design, implementation, and evaluation of population-based cancer screening/prevention programs, especially for the gastric cancer and colorectal cancer.