[A traditional farming environment--a prophylactic factor against allergies].
von Mutius
E
E
D000383:Agriculture; D001249:Asthma / Q000453:epidemiology / Q000517:prevention & control; D006801:Humans; D006967:Hypersensitivity / Q000453:epidemiology / Q000517:prevention & control*; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology / Q000517:prevention & control*; D012424:Rural Population