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Papers: 7 Dec 2019 - 13 Dec 2019
2020 Aug
J Clin Epidemiol
124
Systematic-reviews of analgesics for low back pain generally include published data only. Obtaining data from unpublished trials is potentially important because they may impact effect sizes in meta-analyses. We determined whether including unpublished data from trial registries changes the effect sizes in meta-analyses of analgesics for low back pain.