Members of the U.S. Preventive Services Task Force† are Ned Calonge, MD, MPH, Chair (Colorado Department of Public Health and Environment, Denver, CO); Diana B. Petitti, MD, MPH, Vice-Chair (Arizona State University, Phoenix, AZ); Thomas G. DeWitt, MD (Children's Hospital Medical Center, Cincinnati, OH); Allen Dietrich, MD (Dartmouth Medical School, Lebanon, NH): Kimberly D. Gregory, MD, MPH (Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA); David Grossman, MD, MPH (Group Health Cooperative, Seattle, WA); George Isham, MD, MS (Health Partners, Minneapolis, MN); Michael L. LeFevre, MD, MSPH (University of Missouri School of Medicine, Columbia, MO); Rosanne Leipzig, MD, PhD (Mount Sinai School of Medicine, New York, NY); Lucy N. Marion, PhD, RN (School of Nursing, Medical College of Georgia, Augusta, GA); Bernadette Melnyk, PhD, RN, CPNP/NPP (Arizona State University College of Nursing and Healthcare Innovation, Phoenix, AZ); Virginia A. Moyer, MD, MPH (Baylor College of Medicine, Houston, TX); Judith K. Ockene, PhD (University of Massachusetts Medical School, Worcester, MA); George F. Sawaya, MD (University of California, San Francisco, San Francisco, CA); J. Sanford Schwartz, MD (University of Pennsylvania School of Medicine and The Wharton School, Philadelphia, PA); and Timothy Wilt, MD, MPH (Minneapolis Veterans Affairs Medical Center for Chronic Disease Outcomes Research, Minneapolis, MN).