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Distributions of levels of antibodies to periodontal pathogens and plasma vitamin C concentrations. Serum IgG class antibodies to A. actinomycetemcomitans (A) and P. gingivalis (B) were determined by multiserotype ELISA, and plasma vitamin C concentrations (C) were determined by o-phtaldialdehyde-fluorometry, The sample comprised 194 Finnish men and 237 Russian men.
