Fig. 2From: Safety of denervation following targeted lung denervation therapy for COPD: AIRFLOW-1 3-year outcomesAnnualized moderate to severe COPD exacerbation rate. Annualized rate for the 29 W group (open bars), 32 W group (diagonal bars) and confirmation group (32 W-CFM; gray bars). Combined groups, “All”, are depicted as the red lineBack to article page