title: Appendicectomy and childhood hygiene: different sides of the same coin?
authors.affiliation: Department of Epidemiology, University Hospital, S-751 85 Uppsala, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Ekbom
mesh_terms: D001062:Appendectomy; D002648:Child; D003093:Colitis, Ulcerative / Q000209:etiology*; D003424:Crohn Disease / Q000209:etiology*; D004781:Environmental Exposure; D016481:Helicobacter Infections / Q000150:complications; D016480:Helicobacter pylori; D006801:Humans; D006920:Hygiene; D014881:Water Supply