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Osteogenic and chondrogenic assay. The chondrocyte differentiation marker glycosaminoglycan (GAG) (A) and the osteogenic differentiation marker alkaline phosphatase (ALP) (B) were assessed at different time points, demonstrating the stem cells did not differentiate on the scaffolds in the presence of PL or FBS. Color images available online at www.liebertpub.com/tea
