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Impact of TNF‐α and aspirin on cartilage pellet development during chondrogenesis of BMMSCs. (A) Representative microscopic images showing cartilage pellets cultured under different treatment conditions for 7, 14, and 21 days. (B) Quantitative data showing the mean diameter of cartilage pellets of different treatment groups. Data in (B) are given as the mean ± SD of three independent experiments. *p < 0.05, **p < 0.01, ***p < 0.001. Scale bars: 1 mm
