... SA, Gonio F, Kelly C, Meah S, Barnes PJ: Reproducibil-ity, reliability and diurnal variation of standardised exhaledNO measurements with NIOX™ in healthy and asthmaticchildren and adults made ... was assayed by an enzyme-linked immuno-sorbent assay (Cayman Chemical, Ann Arbor, MI). Thelowest detection limit of the assay was 4.5 pg/ml and theintra and interassay correlation coefficient ... (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Respiratory Research 2005, 6:79 http://respiratory-research.com/content/6/1/79Page...