title: A population-based case-control study of potential risk factors for IBD.
authors.forename: A M
authors.initials: AM
authors.lastname: El-Tawil
mesh_terms: D016022:Case-Control Studies; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000453:epidemiology*; D009017:Morbidity; D011159:Population Surveillance; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D006113:United Kingdom / Q000453:epidemiology