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Decrease of forced expiratory volume in one second (FEV1) and diffusing capacity of the lungs for carbon monoxide (DLCO) in patients with idiopathic interstitial pneumonia carrying the minor allele A of VEGF rs1570360. Horizontal lines in box plots indicate the mean value of each study group. p-values were adjusted by sex, age, smoking history, and packs of cigarettes per year.
