Olsen, J The Danish National Birth Cohort--its background, structure and aim. [electronic resource] - Scandinavian journal of public health Dec 2001 - 300-7 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1403-4948 Standard No.: 10.1177/14034948010290040201 doi Subjects--Topical Terms: Cohort StudiesDenmark--epidemiologyFemaleFetal Diseases--bloodHematologic TestsHumansIncidenceInfant, NewbornInterviews as TopicMaternal Exposure--adverse effectsPatient SelectionPopulation Surveillance--methodsPregnancyPregnancy Complications--bloodPrenatal Exposure Delayed EffectsRegistries