Stimulation of both BA 9 ( n = 7 ) and BA 46 ( n = 8 ) led to similar therapeutic responses in the two groups ( with moderate effect size ) , such as the mean decrease in HDRS ( BA 9 : p = 0.015 ; BA 46 : p = 0.010 ) and MADRS ( BA 9 : p = 0.042 ; BA 46 : p = 0.038 ) scores .