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Cloning efficiency of passages 3, 9, 17 and 25 in FLMSCs. The colony-forming rates were 62.01±5.29, 48.66±3.06, 36.67±3.06 and 25.33±5.03% for passage 3, 9, 17 and 25, respectively, demonstrating the self-renewal ability of the cultured bovine FLMSCs. FLMSCs, fetal lung-derived mesenchymal stem cells.
