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Cross-sectional study finds systematic reviews often search for study reports beyond journal articles, suggesting wider resource usage.
= 1,253) of all the systematic reviews, the searches performed had the potential to identify study reports other than journal articles. Between a third and a half of systematic reviews search for study reports other than journal articles. Systematic review searches often search resources that include study reports other than journal articles, whether or not the reviewers explicitly sought them.
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O'Sullivan et al. (2026) studied this question.
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