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Revisiting issues, drawbacks and opportunities with observational studies in comparative effectiveness research

Demissie Alemayehu1, Joseph C Cappelleri

  • 1Specialty Care Biostatistics, Pfizer Inc., New York, NY, USA.

Journal of Evaluation in Clinical Practice
|December 2, 2011
PubMed
Abstract

Keywords:
biascomparative effectiveness researchconfoundersobservational studiespharmacoepidemiologysecondary sources of data

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