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Longitudinal changes in PFTs and 6MWT in patients with IPF. Notes: Panels showing dynamic changes in (A) FVC% pred., (B) TL,CO% pred., (C) 6MWT. * p < 0.05; ** p < 0.01; *** p < 0.001. Abbreviations: IPF—idiopathic pulmonary fibrosis, PFTs—pulmonary function tests, FVC—forced vital capacity, TL,CO—transfer factor of the lung for carbon monoxide, 6MWT—six-minute walk test.
