Vitamin A and carotene in serum from healthy Danish subjects.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002338:Carotenoids / Q000097:blood*; D003718:Denmark; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012621:Seasons; D012737:Sex Factors; D014801:Vitamin A / Q000097:blood*
D014801:Vitamin A; D002338:Carotenoids