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Effects of hypoxia on the migratory ability of CD133− and CD133+ cells. CD133− and CD133+ cells were pre-incubated under hypoxic or normoxic conditions. The cell migratory ability was analyzed following 12-h incubation under hypoxic or normoxic conditions using the Boyden chamber assay. Data are presented as the mean ± SD. *P<0.05 and **P<0.01; ns, not significant.
