title: Introduction (why epidemiologic research?).
authors.affiliation: Institute of Medicine, University of Bergen, Bergen, Norway.
authors.forename: A
authors.initials: A
authors.lastname: Gulsvik
authors.forename: B
authors.initials: B
authors.lastname: Lundbäck
mesh_terms: D004493:Education; D006801:Humans; D008171:Lung Diseases / Q000453:epidemiology*; D012537:Scandinavian and Nordic Countries / Q000453:epidemiology