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RT-qPCR analysis of BRC. Determination of the expression of cartilage-related genes (SOX9, aggrecan, and COL2A) and genes associated with specific types of cartilage (elastin, PRG4, and α-SMA) via RT-qPCR using β-actin as the reference gene. The expression level of each gene in RC was compared with that of the NC. Abbreviation: EC, ear cartilage; AC, articular cartilage; NC, native cartilage. *p < 0.05.
