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Antigen-specific IgM antibody production (mean ± SD) of male or female C57Bl/6 mice given 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)-propanoate via gavage for 28 days. IgM serum titers were measured in archived sera that had been collected from animals 1 day after exposure ended. *A statistically significant reduction in IgM serum titer relative to the 0 mg/kg group of the matching sex (P < .05).
