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Expression analysis (Q-PCR) of COL1A1 (A), COL3A1 (B), COL5A2 (C) and COL15A1 (D) genes in W1 and its drug resistant sublines. The figure presents relative gene expression of the resistant cell lines (grey bars) with respect to the W1 cell line (white bars), which is assigned a value of 1. Values were considered statistically significant at p<0.05*, p<0.01**, p<0.001***.
