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Exploratory pooled analysis (studies 004 and 006 combined) of change in forced vital capacity (FVC) with pirfenidone 2,403 mg·day−1 (□: n = 345) or placebo (▪: n = 347) in patients with idiopathic pulmonary fibrosis [29, 35]. #: p = 0.005, rank ANCOVA (pirfenidone 2,403 mg·day−1 versus placebo at week 72).
