title: Genetics versus environment in inflammatory bowel disease: results of a British twin study.
authors.affiliation: Inflammatory Bowel Disease Study Group, Royal Free Hospital School of Medicine, London.
authors.forename: N P
authors.initials: NP
authors.lastname: Thompson
authors.forename: R
authors.initials: R
authors.lastname: Driscoll
authors.forename: R E
authors.initials: RE
authors.lastname: Pounder
authors.forename: A J
authors.initials: AJ
authors.lastname: Wakefield
mesh_terms: D000328:Adult; D003093:Colitis, Ulcerative / Q000209:etiology* / Q000235:genetics; D003424:Crohn Disease / Q000209:etiology* / Q000235:genetics; D004781:Environmental Exposure / Q000009:adverse effects*; D006801:Humans; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic