Fig. 3From: Relationship between gut microbiota and lung function decline in patients with chronic obstructive pulmonary disease: a 1-year follow-up studyThe distribution of five most abundant phyla (Firmicutes, Bacteroidetes, Proteobacteria, Fusobacteria, and Verrucomicrobia) in different COPD groups. A: Control-S1; B: Control-S2; C: Decline-S2; D: Decline-S2Back to article page