Figure 1

Serotonin cell densities in the total colon (A), right colon (B) and left colon (C) of IBS patients before and after receiving dietary guidance. The dashed lines labeled ‘a’ and ‘c’ indicate the upper and lower limits of the 95% confidence interval for control subjects, respectively, whereas line ‘b’ indicates the mean serotonin cell density. **P<0.01, ****P<0.0001.