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The number of migrating cells was significantly increased by HMW-HA in four cell lines (BxPC-3, SUIT-2, KP-2, and AsPC-1) and by LMW-HA in all the cell lines (*P < 0.05, **P < 0.01, ***P < 0.001, paired t test). Each bar represents the mean ± SD of six replications.
