title: Why Old McDonald had a farm but no allergies: genes, environments, and the hygiene hypothesis.
authors.affiliation: University Children's Hospital Munich, Ludwig Maximilians University, Germany. Michael.Kabesch@med.uni-muenchen.de
authors.forename: Michael
authors.initials: M
authors.lastname: Kabesch
authors.forename: Roger P
authors.initials: RP
authors.lastname: Lauener
mesh_terms: D000818:Animals; D000829:Animals, Domestic / Q000382:microbiology; D001249:Asthma / Q000209:etiology / Q000235:genetics / Q000382:microbiology; D004781:Environmental Exposure; D006801:Humans; D006920:Hygiene; D006967:Hypersensitivity / Q000209:etiology* / Q000235:genetics / Q000382:microbiology; D011110:Polymorphism, Genetic; D012423:Rural Health