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Chondroitin sulfate (CS) showed no interference with the monocyte chemoattractant protein-1 enzyme-linked immunosorbent assay (P = .78, 95% CI: −5.127 to 4.030) producing a standard curve spiked with 200 µg/mL of CS that was identical to an unspiked standard curve. Group 1 (red): kit standard. Group 2 (green): kit standard + 200 µg/mL CS.
