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Differences in the effects of P4 on cancer-cell proliferation. Left panels: leukemia cell lines (B-cell lymphoma, myeloma, and T-cell lymphoma); right panels: carcinoma cell lines (ovarian clear cell carcinoma, prostate cancer, and triple-negative breast cancer). Data are expressed as the mean ± standard deviation (SD) (n = 3). Student's t-test was performed, and significance is shown as *.
