Fig. 2From: Long-term follow-up of self-expandable metallic stents in benign tracheobronchial stenosis: a retrospective studyTime-to-granulation tissue formation curves Kaplan-Meier curves showing time-to-granulation tissue formation for covered and uncovered stents implantation in patients with benign tracheobronchial stenosis (median 22 days vs 23 days, P = 0.659)Back to article page