title: An evidence-based approach to studies of the natural history of gastrointestinal diseases: recurrence of symptomatic Crohn's disease after surgery.
authors.affiliation: Department of Medicine, and Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-6021, USA. jlewis@cceb.med.upenn.edu
authors.forename: James D
authors.initials: JD
authors.lastname: Lewis
authors.forename: Philip
authors.initials: P
authors.lastname: Schoenfeld
authors.forename: Gary R
authors.initials: GR
authors.lastname: Lichtenstein
mesh_terms: D000328:Adult; D003424:Crohn Disease / Q000601:surgery*; D019317:Evidence-Based Medicine; D005260:Female; D006801:Humans; D016247:Information Storage and Retrieval; D011379:Prognosis; D012008:Recurrence