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ABCB1+ cells exhibit increased clonogenicity and migration. (A) Single-cell clonogenic assays in ABCB1+ and ABCB1− cells. Small colonies, < 64 cells; large colonies ≥ 64 cells. (B) Soft agar colony forming assays in ABCB1+ and ABCB1− cells. (C) Cell migration assays in ABCB1+ and ABCB1− cells. *P<0.05.
