Fig. 4From: Effect of oral glycine on the clinical, spirometric and inflammatory status in subjects with cystic fibrosis: a pilot randomized trialCorrelations between peripheral blood leukocytes and FEV1 in subjects with cystic fibrosis. The scatter plots correspond either to all measures obtained at all visits (empty circles) or to the mean of the six visits for each patient (filled circles). The Pearson’s correlation coefficient (r) and its corresponding p value are shown in each panelBack to article page