The health and nutrition examination survey in the USA.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001205:Ascorbic Acid / Q000378:metabolism; D002624:Chemistry, Clinical; D002648:Child; D002675:Child, Preschool; D005069:Evaluation Studies as Topic; D005260:Female; D006306:Health Surveys; D006454:Hemoglobins / Q000378:metabolism; D006801:Humans; D007223:Infant; D008297:Male; D008722:Methods; D008875:Middle Aged; D009748:Nutrition Disorders / Q000175:diagnosis* / Q000453:epidemiology; D009749:Nutrition Surveys; D010808:Physical Examination; D011153:Population; D012959:Socioeconomic Factors; D014481:United States; D014801:Vitamin A / Q000378:metabolism
D006454:Hemoglobins; D014801:Vitamin A; D001205:Ascorbic Acid