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Differences in interaction and subgroup-specific effects were observed between randomized and nonrandomized studies

Amand F Schmidt1, Maroeska M Rovers, Olaf H Klungel

  • 1Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands. a.f.schmidt@umcutrecht.nl

Journal of Clinical Epidemiology
|March 21, 2013
PubMed
Abstract

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