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Device agreement. Scatter plots of the mean of three valid FENO measurements using the NIOX vs (A) the mean of three valid FENO measurements, or vs (B) the first valid FENO measurement using the NIOX MINO (n = 61). Repeatability coefficients (ICCs) were (A) 0.97 and (B) 0.98, respectively (p < 0.001 for both).
