Fig. 1From: Protective role of the alpha-1-antitrypsin in intervertebral disc degenerationA Comparison of serum levels of AAT between disc degeneration patients and control participants. B The serum level in disc degeneration patients with different disease severity, classified by Pfirmann grade. HC = healthy control. N = 15 for each group. (*p < 0.05, **p < 0.005, ***p < 0.001)Back to article page