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Poloxamer 407 alone as no anti‐tumor effect on subcutaneous growth of Kg‐1 cells in nude mice. Kg‐1 cells were cultured and then prepared as cell suspensions in physiological saline with 2%, 4%, or 6% Poloxamer 407. Cell suspensions were injected into nude mice to form subcutaneous tumors. The results were shown as images of tumor tissues (A), tumor volumes (B), or tumor weights (C)
