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Sphere formation (A), expression of stemness markers (B), and cell cycle (C) analyses were performed after TFR1 knockdown in the presence or absence of FAC and DFO. Images were obtained using a 20× objective. *P<0.05, vs. the shScrambled group. #P<0.05, vs. the shTFR1-1/2 group; &P<0.05, vs. the shTFR1-1/2+FAC group.
