Serum vitamin A and carotenoids of Canadians.
D002170:Canada; D002338:Carotenoids / Q000097:blood*; D003124:Colorimetry; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D012907:Smoking; D014801:Vitamin A / Q000097:blood*; D014802:Vitamin A Deficiency / Q000453:epidemiology*
D014801:Vitamin A; D002338:Carotenoids