title: Letter: Ulcerative colitis in the elderly.
mesh_terms: D000367:Age Factors; D000368:Aged; D003093:Colitis, Ulcerative / Q000097:blood / Q000276:immunology; D006801:Humans; D007136:Immunoglobulins / Q000302:isolation & purification; D008875:Middle Aged
chemical_list: D007136:Immunoglobulins