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Induction of catalase activity after azelaic acid (2.5 and 25 mM) treatment in the bulge (A and B) and bulb cells (C and D). Azelaic acid was added 30 min before UVB (20 mJ/cm2) (A and C) or promptly after UVB radiation (B and D). *p<0.05 when compared to control and sham
