The effect of administering a vitamin supplement, in capsules, to groups of workers in the steel industry.
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D002214:Capsules; D019587:Dietary Supplements; D006801:Humans; D007221:Industry; D008511:Medicine; D052756:Nutritional Sciences; D009787:Occupational Medicine; D009790:Occupations; D013232:Steel; D014801:Vitamin A; D014815:Vitamins
D002214:Capsules; D014815:Vitamins; D014801:Vitamin A; D013232:Steel
INDUSTRY AND OCCUPATION/medicine; NUTRITION; VITAMINS