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Immune serum reduced viability of ATAK cells after 24 hours of culture. ATAK cells were cultured in the presence of nonimmune serum (control) or in immune serum. Viability in each well was normalized to the median viability in the control wells. Median and interquartile ranges are shown. *P < .01 (vs all other groups).
Abbreviation: ATAK, activated transfected killer.
