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Growth characteristics of bMSCs and aMSCs during subculture. A) The growth curves of bMSCs at early passages. B) The growth curves of aMSCs at early passages. C) The expansion folds of bMSCs and aMSCs at early passages. D) CPD during long-term subculture. E) PDT during long-term subculture. *: P < 0.05 compared to aMSCs (n = 3).
