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Change in cough scores and PEF according to time and group. Figures demonstrate values of cough score (A) and PEF (B) at each time point in ICS group (●) and ICS + LTRA group (○). ICS, inhaled corticosteroid; LTRA, leukotriene receptor antagonist; PEF, peak expiratory flow. * P-value < 0.05; *** P-value < 0.001, compared to baseline.
