Consent for future genetic research: the NHANES experience in 2007-2008.

The National Health and Nutrition Examination Survey (NHANES) is a program of studies con ducted since the 1960s by the National Center for Health Statistics of the U.S. Centers for Disease Control and Prevention. Its purpose is to obtain infor mation on the health and nutritional status of the U.S. population. The survey involves interviews and physi cal examinations of a nationally representative sample of civilian and noninstitutionalized...