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HepG2 and SMMC-7721 cells were seeded into 6-well plates and grown to 90% confluence. Then, the confluent cell monolayers were scraped with a 10 μL pipette tip to create wounds. The cellular debris was removed and cells were cultured in FBS-free medium. Pictures were taken under a microscope (Leica) at 0, 24, and 48 h. The difference in wound width represents the migration ability.

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