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Pigment epithelium-derived factor (PEDF) recombinant protein has been investigated in many kinds of solid tumors due to its potent antiangiogenic activity. However, the complexity of protein purification, instability of recombinant protein and requirement of repeated injections are obstacles for the recombinant PEDF therapy for solid tumors. We successfully synthesized polyethyleneglycol–polyetherimide...
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