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(a) The representative micrographs of TUNEL staining showing an increase of TUNEL-positive cells after osteoarthritis (OA) induction. Notably, fewer TUNEL-positive cells were observed in EGCG-treated OA joints. (b) Quantitative analysis of chondrocyte apoptosis in three groups. (** p < 0.01 OA vs. control; ## p < 0.01 OA vs. EGCG).
