title: Observational studies: getting clear about transparency.
abstract: The PLOS Medicine Editors endorse four measures to ensure transparency in the analysis and reporting of observational studies. Please see later in the article for the Editors' Summary.
mesh_terms: D035081:Editorial Policies; D017408:Guidelines as Topic / Q000592:standards*; D064887:Observational Studies as Topic / Q000592:standards*; D010506:Periodicals as Topic