The fifth decade of vitamin A research.
D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D004798:Enzymes; D005856:Germ-Free Life; D006801:Humans; D051381:Rats; D012098:Reproduction; D012959:Socioeconomic Factors; D013499:Surface Properties; D014481:United States; D014785:Vision, Ocular; D014801:Vitamin A / Q000138:chemical synthesis / Q000378:metabolism; D014808:Vitamin D Deficiency
D004798:Enzymes; D014801:Vitamin A