Principal component analysis, median plotting and Pearson's correlation analysis before and after normalization.<br><b>A & B</b>: median of log2 PCD samples expression values to non PCD log2 expression values, before (<b>A</b>) and after (<b>B</b>) normalization. <b>C & D</b>: Pearson correlation heatmap between PCD an non PCD samples, before (<b>C</b>) and after (<b>D</b>) normalization. <b>E & F</b>: Principal component analysis of samples before (<b>E</b>) and after (<b>F</b>) normalization. <br
