Fig. 5
Mean ± SD of messenger RNA relative expression of a βA-subunit, b βB-subunit, c IIA receptor, d IIB receptor, e smad2, f smad3, g smad4, h smad6, i smad7 and j follistatin the different study groups. (a = P < 0.05 compared with control group; b = P < 0.05 compared with S-AOM group)