Traditional Chinese medicine syndrome distribution and neuroendocrine mechanisms of irritable bowel syndrome: cross-sectional study Open, multicenter, phase Ⅳ clinical trial of Shenbei Guchang capsules in treatment of diarrhea type irritable bowel syndrome Effect of Weichang‘an pill on intestinal digestive ferment and the AQP4 concentration in proximal colon in IBS-D rats Advances in studies on mechanism of Baizhu Shaoyao Powder against irritable bowel syndrome Influence of iridoid from Valeriana jatamansi on 5-HT and 5-HIAA in rats with irritable bowel syndrome Mechanism of Tongxieyaofang on irritable bowel syndrome Advances in studies on mechanism of Baizhu Shaoyao Powder against irritable bowel syndrome Effect of Weichang Anwan on NO and 5-HT in blood serum,SP and MC in colon in IBS-D rats Observe effect of treating C-IBS by Tongyouqing