title: Secondary analysis of electronic databases: potentials and limitations. Reply to Asghari S, Mahdavian M [letter].
authors.forename: K
authors.initials: K
authors.lastname: Kostev
authors.forename: W
authors.initials: W
authors.lastname: Rathmann
mesh_terms: D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D003930:Diabetic Retinopathy / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male