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Serum Concentrations of Alpha-Tocopherol and Beta Carotene before and after Supplementation, According to Intervention. Beta Carotene Cancer Prevention Study Group The Alpha-Tocopherol, N Engl J Med 1994;330:1029-1035.
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Serum Concentrations of Alpha-Tocopherol and Beta Carotene before and after Supplementation, According to Intervention Beta Carotene Cancer Prevention Study Group The Alpha-Tocopherol, N Engl J Med 1994;330:1029-1035