title: Nutritional status of preschool children: plasma vitamin A.
mesh_terms: D002675:Child, Preschool; D004032:Diet; D006801:Humans; D007182:Income; D009749:Nutrition Surveys; D012959:Socioeconomic Factors; D014481:United States; D014801:Vitamin A / Q000097:blood*
chemical_list: D014801:Vitamin A