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Effects of EGF, HGF or TGFβ on melanoma cell lines' invasiveness. Invasive potential of cells treated with SM was compared to invasive potential of control cells not treated with SM. Results expressed as the mean ±SD are representative for at least three independent experiments. Statistical significance was determined in two-tailed, unpaired Student’s t-test. Significance levels were set at P≤0.05 (one asterisk), P≤0.01 (two asterisks) and P≤0.001 (three asterisks).
