title: Concordance of arthritis and iritis in identical twins with ulcerative colitis.
mesh_terms: D000328:Adult; D001168:Arthritis / Q000235:genetics*; D003093:Colitis, Ulcerative / Q000235:genetics*; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D007500:Iritis / Q000235:genetics*; D012446:Sacroiliac Joint