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Oestrogen retained the loss of hPDLSCs stemness in long‐term culture. E2 promoted the proliferation rate and colony‐forming capability of hPDLSCs during long‐term culture (A, B). The expression of human telomerase reverse transcriptase (hTERT) and stemness‐related genes was tested by RT‐PCR (C). Data are shown as the mean ± SDs of 3 separate experiments. *P<.05; **P<.01; NS, no statistical significance
