Copyright information:Taken from "Airway sizes and proportions in children quantified by a video-bronchoscopic technique"BMC Pulmonary Medicine 2006;6():5-5.Published online 8 Mar 2006PMCID:PMC1421432.Copyright © 2006 Masters et al; licensee BioMed Central Ltd. mm) plotted against weight (Wt) with the line of best fit and 95% CI lines derived from univariate analyses.