title: Response to letter to the editor on administrative database research infrequently uses validated diagnostic or procedural codes.
authors.forename: Carl
authors.initials: C
authors.lastname: van Walraven
mesh_terms: D000465:Algorithms; D016208:Databases, Factual / Q000592:standards*; D019317:Evidence-Based Medicine / Q000592:standards*; D006298:Health Services Administration / Q000592:standards; D006302:Health Services Research / Q000592:standards*; D006801:Humans; D038801:International Classification of Diseases / Q000592:standards*; D011237:Predictive Value of Tests; D054928:Validation Studies as Topic