Fig. 2
From: Impaired diversity of the lung microbiome predicts progression of idiopathic pulmonary fibrosis

The relationships between FVC and relative abundance of bacteria. a Phylum Firmicutes, (b) Phylum Proteobacteria, (c) Family Streptococcaceae and (d) Family Veillonellaceae. In each case, linear regression lines have been fitted. Spearman’s test. ρ: Spearman rank-correlation coefficient, *: p < 0.05, **: p < 0.01