title: Unpublished studies hold twice as much data on drugs as those in public domain, study finds.
authors.affiliation: BMJ.
authors.forename: Zosia
authors.initials: Z
authors.lastname: Kmietowicz
mesh_terms: D022126:Access to Information; D002986:Clinical Trials as Topic; D017277:Drug Approval; D004341:Drug Evaluation; D004345:Drug Industry; D005060:Europe; D019317:Evidence-Based Medicine; D006801:Humans