Fig. 5From: Inflammatory profiles in canine intervertebral disc degenerationPercentage of COX-2-positive cells in the nucleus pulposus (NP) and annulus fibrosus (AF) per Pfirrmann grade. The NP and AF of grade I and grade II samples were significantly lower compared with the NP and AF grade IV + V samples. ** Indicate significant difference at a 99 % confidence levelBack to article page