title: How much of the farming effect is environmental?
authors.forename: Linus
authors.initials: L
authors.lastname: Grabenhenrich
authors.forename: Thomas
authors.initials: T
authors.lastname: Keil
mesh_terms: D000383:Agriculture; D001249:Asthma / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D012424:Rural Population; D011795:Surveys and Questionnaires