title: Requirements for utilizing health care-based data sources for research.
authors.forename: J André
authors.initials: JA
authors.lastname: Knottnerus
authors.forename: Peter
authors.initials: P
authors.lastname: Tugwell
mesh_terms: D015982:Bias; D016208:Databases, Factual; D019317:Evidence-Based Medicine; D006304:Health Status; D006801:Humans; D015201:Meta-Analysis as Topic; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design