title: Genetic and environment in asthma: the answer of twin studies.
authors.forename: G H
authors.initials: GH
authors.lastname: Koppelman
authors.forename: H
authors.initials: H
authors.lastname: Los
authors.forename: D S
authors.initials: DS
authors.lastname: Postma
mesh_terms: D001249:Asthma / Q000209:etiology* / Q000235:genetics; D004781:Environmental Exposure; D006801:Humans; D018433:Twin Studies as Topic