title: On guidelines for comparative effectiveness research using nonrandomized studies in secondary data sources.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schneeweiss
mesh_terms: D057186:Comparative Effectiveness Research / Q000379:methods* / Q000592:standards; D003659:Decision Making, Organizational; D055317:Evidence-Based Practice; D017408:Guidelines as Topic / Q000592:standards*; D006801:Humans; D012106:Research / Q000592:standards; D012107:Research Design; D014481:United States