title: Reply: To PMID 23399739.
authors.forename: Peter L
authors.initials: PL
authors.lastname: Lakatos
authors.forename: Laszlo
authors.initials: L
authors.lastname: Lakatos
mesh_terms: D003093:Colitis, Ulcerative / Q000209:etiology*; D003424:Crohn Disease / Q000209:etiology*; D004781:Environmental Exposure / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D012907:Smoking / Q000009:adverse effects*