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National Health and Nutrition Examination Survey
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Survey research program conducted by the National Center for Health Statistics
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Wikipedia

The National Health and Nutrition Examination Survey (NHANES) is a survey research program conducted by the National Center for Health Statistics (NCHS) to assess the health and nutritional status of adults and children in the United States, and to track changes over time. The survey combines interviews, physical examinations and laboratory tests.

References
Wikidata