Table 2.

Adverse events by group.

	Group 1	Group 2
	Healthy volunteers (n = 6)	Asthma (n = 4)	Smokers (n = 4)	Cystic fibrosis (n = 4)
Adverse events, n (%)
Any	4 (66%)	2 (50%)	4 (100%)	4 (100%)
Serious	0	0	0	0
Adverse events description, n
Nasopharyngeal discomfort	1	1	1	1
Breathing discomfort		1		1
Lightheadedness	1		1	1
Headache	2
Increased phlegm expectoration		1
Unsteady gait	1
Cannula site pain			1
Chest tightness				1
Asthma exacerbation		1
Contact dermatitis to dressing				1
Pre-syncope following venepuncture			1