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Watt, F., et al. Activin Is an Anti-Catabolic Cytokine Produced by Injured Cartilage via Release of Fibroblast Growth Factor-2 and Activation of Nuclear Factor Kappa B. 2008, pp. II177–II177.

Watt, F, S Alexander, Y Sawaji, M Hermansson, and J Saklatvala. 2008. “Activin Is an Anti-Catabolic Cytokine Produced by Injured Cartilage via Release of Fibroblast Growth Factor-2 and Activation of Nuclear Factor Kappa B.” In , 47:II177–II177.