Figure 6From: Comparison of exhaled breath condensate pH using two commercially available devices in healthy controls, asthma and COPD patients Comparison of EBC pH values obtained by ECoScreen (left panel) or RTube (right panel) in healthy controls, and patients with asthma, COPD or a cold (n = 10 per group). Using both devices, pH values in patients with a cold were significantly lower than in healthy controls, whereas the other patient groups did not show a difference.Back to article page