Figure 1.

Cathepsin K expression and stages of disc degeneration. Cathepsin K gene expression was significantly greater in annulus tissue from more degenerated discs than in healthier discs (P = 0.001). Data are means ± s.e.m.

Gruber et al. Arthritis Research & Therapy 2011 13:R140   doi:10.1186/ar3454
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