Fig. 7

Reactive Oxygen Species (ROS) level in epithelial spheroids from control, asthma, and COPD groups with or without PM_2.5 stimulation presented as % of unstimulated spheroids within each group. The data are presented as median (line), IQR (box) and 5–95 percentile (whiskers). The significant changes are marked as * p ≤ 0.05; ** p ≤ 0.01