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A1-9: Crystal violet staining of PC cells through polycarbonate membrane pores (×200 magnification). B: Cell counts of migrating PC cells as analyzed by transwell assay. C1-3: Cell proliferation as determined by MTT (C1: BxPC-3 cells; C2: AsPC-1 cells; C3: Panc-1 cells). *P<0.05, **P<0.01.
