title: Challenges in using hospital billing databases for epidemiology.
authors.affiliation: Hôpital Universitaire des Enfants Reine Fabiola, Université Libre de Bruxelles, Brussels, Belgium.
authors.forename: Bernard
authors.initials: B
authors.lastname: Dan
mesh_terms: D004827:Epilepsy / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D008881:Migraine Disorders / Q000453:epidemiology*