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The European Respiratory Journal|March 5, 1999
Salivary contribution to exhaled nitric oxideW Zetterquist, C Pedroletti, J O Lundberg, et al.
The European Respiratory Journal|August 9, 2002
Exhaled carbon monoxide is not elevated in patients with asthma or cystic fibrosisW Zetterquist, H Marteus, M Johannesson, et al.
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