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Correlations between FEV1 of total asthmatics and of moderate/severe asthmatics and concentrations of TNF-α and CXCL8 (IL-8). Correlation coefficients were obtained by Spearman's rank-order method with correction for tied values. FEV1: Forced expiratory volume in 1 s; TNF-α: Tumor necrosis factor-α; IL-8: Interleukin-8.
