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The manuscript is a brief version of Manchikanti L, et al The impact of comparative effectiveness research on interventional pain management: evolution from Medicare Modernization Act to Patient Protection and Affordable Care Act and the Patient-Centered Outcomes Research Institute. Pain Physician 2011;14:E249–282. This version is published with the consent of all of the authors and the permission of the journal Pain Physician.
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.
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