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Concentrations of proinflammatory cytokines IL-1, TNF-α, IL-6, and IL-17 in BAL fluid from asthmatics (mild: n = 37, moderate/severe: n = 33) and controls (n = 30). Mann–Whitney U-test. IL-1: Interleukin-1; TNF-α: Tumor necrosis factor-α; BAL: Bronchoalveolar lavage.
