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Catechol-O-Methyltransferase val158met Polymorphism Predicts Placebo Effect in Irritable Bowel Syndrome
- Kathryn T. Hall,
- Anthony J. Lembo,
- Irving Kirsch,
- Dimitrios C. Ziogas,
- Jeffrey Douaiher,
- Karin B. Jensen,
- Lisa A. Conboy,
- John M. Kelley,
- Efi Kokkotou,
- Ted J. Kaptchuk
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- Published: October 23, 2012
- https://doi.org/10.1371/journal.pone.0048135