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Cytotoxicity of the nanosystem in vitro. a) Live/Dead staining of chondrocytes co‐cultured with HA, SNAs, HA‐SNAs, HA‐SNAs+NIR detected employing fluorescence microscopy. b) The live cell count summarized from the Live/Dead assay. c) Cytotoxicity of HA, SNAs, HA‐SNAs, and HA‐SNAs+NIR on chondrocytes examined with CCK‐8. n = 3; NS = no significance; ***p < 0.001.
