title: [Complex sampling designs].
authors.affiliation: Servicio de Prevención y Control del Cáncer. Institut Català d'Oncologia.
authors.forename: E
authors.initials: E
authors.lastname: Fernández
authors.forename: A
authors.initials: A
authors.lastname: Schiaffino
mesh_terms: D015340:Epidemiologic Research Design; D006801:Humans; D015983:Selection Bias