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Collagen I expression in TCGA HCC patients. a COL1A1 (Collagen I α1 chain) was significantly overexpressed in HCC samples than adjacent non-tumoral tissues. b The positive correlations were observed between COL1A1 expression and expression of proliferation marker Ki-67 (r = 0.11, P = 0.0338) or EMT marker Twist (r = 0.6699, P<0.0001). c High COL1A1 expression combined with expression of PCNA (proliferation marker) predicted unfavorable survival outcomes in TCGA HCC patients
