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Cytokine production from PBMCs. The levels of six different cytokines were measured in the culture supernatants of PBMCs exposed to 0.1 μg/ml LPS from Porphyromonas gingivalis (PG) or Escherichia coli (EC) for 20 hr and incubated at 37°C. Results are from six independent experiments. *, p < .05; **, p < .01
