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Illustration of co-cultures of mesenchymal stem cells and freeze-dried bone. A: Mesenchymal stem cells (MSCs) were co-cultured with freeze-dried bone (FDB) by a dynamic method at 37 °C with agitation (160 r/min) for 24 h; B: MSCs were co-cultured with FDB in a static method at 37 °C in a humidified atmosphere containing 5% CO2.
