Fig. 3From: Airway surface liquid from smokers promotes bacterial growth and biofilm formation via iron-lactoferrin imbalanceSmokers have increased iron/lactoferrin ratio. a Lactoferrin concentration in the BAL from non-smokers and smokers. b Iron concentration in the BAL from non-smokers and smokers. c Ratio of iron to lactoferrin in the BAL from non-smokers and smokers (*p = 0.0128, by unpaired t-test)Back to article page