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American Journal of Clinical Nutrition, Vol 60, 147-147, Copyright © 1994 by The American Society for Nutrition
E Joosten, A van den Berg, R Riezler, HJ Naurath J Lindenbaum, SP Stabler, RH Allen. Metabolic evidence that deficiencies of vitamin B-12 (cobahamin), folate, and vitamin B-6 occur commonly in elderly people. Am J Chin Nutr 1993;58:468-76. The section of the methods that describes the determination of serum vitamin and metabohite concentrations on page 469 should read (heft-hand column, second paragraph, line 7), "Vitamin B-6 was measured by a radioenzymatic assay method: deproteinized serum is incubated with apoenzyme tyrosine apodecarboxylase...."
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