Figure 1C. Dot plots representation of individual forced expiratory flow at the middle half of the FVC (FEF25-75) at the four timepoints of assessment for 16 EC users with asthma. The line in the figure shows the mean. * p≤0.05; ** p≤0.01; *** p≤0.001 compared to baseline. Abbreviations: F/up, follow-up; L/sec, liters/second.
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