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. 2022 Sep 24;17:73. doi: 10.1186/s13000-022-01253-0

Fig. 1.

Fig. 1

PCA scatter plot based on gene expression profiles in 301 samples from 5 datasets. Left: Merged datasets before batch effect correction; datasets are specified with different colors. LGG and HGG samples are shown with circle and triangle symbols, respectively. Right: Merged datasets after batch effect correction; blue and red dots are shown HGG and LGG samples, respectively