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Increased bacterial burden in idiopathic pulmonary fibrosis at the time of diagnosis increases mortality. Kaplan–Meier curve generated by Cox proportional-hazards model stratified by bacterial burden (low tertile: 4.15×103–3.17×104 16S rRNA gene copies·mL−1 of bronchoalveolar lavage (BAL) fluid; middle tertile: 3.33×104–1.90×105 16S rRNA gene copies·mL−1 of BAL fluid; high tertile: 1.90×105–5.44×106 16S rRNA gene copies·mL−1 BAL fluid). Log rank p test value reported.
