Claudia I. Henschke, Ph.D., M.D., is chief, Division of Chest Imaging, at the New York Presbyterian Hospital-Cornell Medical Center and professor of radiology at the Weill Medical College of Cornell University. She has served on committees of the National Institutes of Health, the National Academy of Science, the Radiological Society of North America, and the American College of Radiology. For information about her work on early detection of lung cancer, see www.nyelcap.org. Peggy McCarthy, MBA, president of McCarthy Medical Marketing, Inc., and Innovative Medical Education Consortium, Inc., is a prominent cancer patient advocate. She is founder and board member of the Alliance for Lung Cancer Advocacy, Support, and Education (ALCASE) and works internationally for lung cancer awareness. Sarah Wernick, Ph.D., is an award-winning freelance health writer. Her books include the best-selling Strong Women Stay Young.