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A. Differential expression of COL1A1 in different cancer grade of LGG. Based on data from 258 grade2(G2) patients and 270 grade3(G3) patients in TCGA. B. Multivariate Cox analysis of COL1A1 expression and clinical pathological factors. As age, tumor grade and COL1A1 expression are independent prognostic factors (* P <0.05; ** P < 0.005;*** P < 0.001).
