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. 2013 May 5;15(1):19–28.

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Fig 3 — Effects of IL-1α on proteoglycan degradation. The samples were stained with Alcian blue. A. Section from control group after 28 days. B. Section from a cartilage explant cultured for 3 days in the presence of IL-1α. C. Section from a cartilage explant cultured for 7 days in the presence of IL-1α. D. Section from a cartilage explant cultured for 14 days in the presence of IL-1α. E. Section from a cartilage explant cultured for 21 days in the presence of IL-1α. F. Section from a cartilage explant cultured for 28 days in the presence of IL-1α. Magnification ×400.