Crohn's disease in the elderly.
D000367:Age Factors; D000368:Aged; D003092:Colitis / Q000453:epidemiology; D003424:Crohn Disease / Q000453:epidemiology* / Q000401:mortality; D006801:Humans; D007079:Ileitis / Q000453:epidemiology; D008875:Middle Aged; D006113:United Kingdom