(A) Venn diagram of DEGs between the mild and severe contusion groups. (B) PCA results of the 1620 genes shared between the mild and severe contusion groups; samples are colored according to the degree of damage (top) and wound age (bottom). (C) Clustered heatmap of all DEGs based on HCL (left: -M and -S indicate mild and severe damage, respectively) and the mean expression of each gene cluster according to wound age (right).