No abstract available
MeSH terms
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Animals
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Birds
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Carotenoids / metabolism
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Chemistry
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Dogs
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Europe
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History, 19th Century
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History, 20th Century
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History, Ancient
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Humans
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Night Blindness / etiology
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Nutritional Requirements
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Rats
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Swine
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United States
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Vitamin A / history
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Vitamin A / metabolism*
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Vitamin A Deficiency / history
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Xerophthalmia / etiology