Fig. 10From: Measurement of C-reactive protein, procalcitonin and neutrophil elastase in saliva of COPD patients and healthy controls: correlation to self-reported wellbeing parametersSalivary NE levels from stable and the same COPD subjects during an exacerbation. The horizontal bar represents the median; the box length represents the interquartile range. Outliers are identified by o (1.5 x the interquartile range) and * (3 x the interquartile range)Back to article page