title: Azathioprine and ulcerative colitis: a "second-look" meta-analysis.
authors.forename: Barrett G
authors.initials: BG
authors.lastname: Levesque
authors.forename: Ingram
authors.initials: I
authors.lastname: Olkin
mesh_terms: D001379:Azathioprine / Q000627:therapeutic use*; D015982:Bias; D003093:Colitis, Ulcerative / Q000188:drug therapy*; D018849:Controlled Clinical Trials as Topic; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use*; D015201:Meta-Analysis as Topic; D016896:Treatment Outcome
chemical_list: D007166:Immunosuppressive Agents; D001379:Azathioprine