An approach to the asthma-protective farm effect by geocoding: Good farms and better farms.
S E K Müller-RompaI MarkevychA J HoseG LossI M WoutersJon GenuneitC Braun-FahrländerE HorakA BoznanskiD HeederikE von MutiusJ HeinrichMarkus Johannes Egenull nullPublished in: Pediatric allergy and immunology : official publication of the European Society of Pediatric Allergy and Immunology (2018)
Clustering of farms within a neighborhood of 100 m is strongly associated with the protective effect on asthma and may represent a more traditional style of farming with broader microbial exposure.