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Longnecker, Matthew P.; Martin-Moreno, Jose-Maria; Knekt, Paul; Nomura, Abraham M. Y.; Schober, Susan E.; Stähelin, Hannes B.; Wald, Nicholas J.; Gey, K. Fred; Willett, Walter C. (1992). Serum α-Tocopherol Concentration in Relation to Subsequent Colorectal Cancer: Pooled Data From Five Cohorts. Journal of the National Cancer Institute JNCI, 84(6), pp. 430-435. Oxford University Press 10.1093/jnci/84.6.430
