Thorax · 2002 · 42 citations · 14 references
The methacholine test should not be used immediately before measurement of exhaled NO in children with asthma.
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Increased nitric oxide in exhaled air of asthmatic patients
Sergei A. Kharitonov, D. H. Yates, R A Robbins et al. · The Lancet · 1994 · 1.4K citations