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The Irritable Bowel Syndrome Outcome Study (IBSOS): Rationale and design of a randomized, placebo-controlled trial with 12month follow up of self- versus clinician-administered CBT for moderate to severe irritable bowel syndrome

Functional Gastrointestinal DisorderPsychiatryGastroenterologyPlacebo-controlled TrialIrritable Bowel SyndromeClinical GastroenterologyMedicine