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In vivo migration studies. Seven days after tumor cell inoculation intothe right frontal lobe, EGFP-expressing MSCs (MSCs-EGFP; 2 105) wereimplanted into the opposite hemisphere (2 mm lateral and 1 mm anteriorto bregma, at a depthof 2.5 mm from the skull base), or PKH26 (Sigma)–...