Figure 5

Different timepoint after nylon brush scraping, (a) one-week post-surgery; (b) two weeks post-surgery; (c) three weeks post-surgery, with only mild stenosis formed in the trachea.
Different timepoint after nylon brush scraping, (a) one-week post-surgery; (b) two weeks post-surgery; (c) three weeks post-surgery, with only mild stenosis formed in the trachea.