title: Smoking status in therapeutic trials in Crohn's disease.
authors.forename: D P B
authors.initials: DP
authors.lastname: McGovern
authors.forename: S P L
authors.initials: SP
authors.lastname: Travis
mesh_terms: D003424:Crohn Disease / Q000628:therapy*; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D012107:Research Design; D012907:Smoking / Q000009:adverse effects*