Figure 5From: Polymorphisms in nitric oxide synthase and endothelin genes among children with obstructive sleep apnea qRT-PCR analysis for EDN1 gene expression in children with OSA and controls (NOSA). Data are presented as relative mRNA expression levels normalized to 18s, and individual values and boxplots are shown (OSA vs. NOSA: P-value <0.0005).Back to article page