Methodologic considerations of the National Health and Nutrition Examination Survey.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008722:Methods; D008875:Middle Aged; D009309:National Center for Health Statistics, U.S.; D009313:National Health Programs; D009749:Nutrition Surveys; D014481:United States; D014492:United States Public Health Service