Figure 2.

Immunolocalization of brain-derived neurotrophic factor in annulus cells with prominent encapsulating extracellular matrix. (a) Inner annulus, subject number 6, L4 to L5. (b) Inner annulus, subject number 12, L4 to L5. Bars = 10 μm.

Gruber et al. Arthritis Research & Therapy 2008 10:R82   doi:10.1186/ar2456
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