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Reactive oxygen species (ROS) in control and severe asthmatic patients experiencing severe exacerbation. (A): total ROS level on whole blood was obtained using electron paramagnetic resonance. n = 16 per group. (B): ROS level on PBMC was detected by MitoSOX-based spectrofluorimetry detection. Results are expressed as means ± standard error of the mean (SEM). n = 8 per group. * p < 0.05.
