Boxplots representing the distribution of the expression clusters 2 and 3 across tertiles of PCA summary score for MPSP and infant temperament indices.

<p>A. PCA summary score for MPSP indices. B. PCA summary score for infant temperament indices. In each graph “low”, “average” and “high” represent the tertiles of the PCA summary score for MPSP and infant temperament indices. The star symbol and the bracketing lines represent the tertiles for which significant (p < 0.05) differences in gene expression have been detected.