Stratification by sex and subgroup is necessary for RCT on IBS.
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D000818:Animals; D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000628:therapy*; D008297:Male; D016032:Randomized Controlled Trials as Topic; D051381:Rats; D012107:Research Design