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Secretion of cytokines by HMEE cells stimulated with NTHI 2019, DK-1, or B29. Results are mean concentrations of IL-6, IL-8, and MCP-1 (± SEM) in cell supernatants from two duplicate wells in ELISAs from three experiments. ✻, P < 0.05 (NTHI 2019 or DK-1 versus B29).
