On the other hand, BMP4 mRNA exhibited a significantly negative correlation with BMP4 protein in the CHD group (p = 0.04, Spearman rho = −0.259), while no correlation was found between BMP4 mRNA and protein levels in the normal hearts (p = 0.73, Spearman rho = 0.134). This evidence concerns the gene BMP4 and coronary artery disorder.