Search for unpublished data by systematic reviewers: an audit.
Ziai Hedyeh, Zhang Rujun, Chan An-Wen, +1 more·BMJ open
OBJECTIVES: We audited a selection of systematic reviews published in 2013 and reported on the proportion of reviews that researched for unpublished data, included unpublished data in analysis and assessed for publication bias. DESIGN: Audit of systematic reviews. DATA SOURCES: We searched PubMed and Ovid MEDLINE In-…