Fig. 3
From: S100 and p65 expression are increased in the masseter muscle after botulinum toxin-A injection
Immunohistochemical staining for p65. a Saline-treated group; b 5-U BTX-A-treated group; c 10-U BTX-A-treated group (without counterstaining, bar = 20 μm). d Measurement of the average intensity of staining (*P < 0.05)