title: Sulphasalazine use as a preventive factor for colorectal cancer in ulcerative colitis patients-a review.
authors.affiliation: *Department of Cancer Epidemiology, University Hospital, Uppsala, Sweden; †Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, U.S.A.; and ‡Department of Surgery, Södersjukhuset, Stockholm, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Ekbom
authors.forename: D
authors.initials: D
authors.lastname: Kornfeld