Epidemiology of ulcerative colitis.
D003093:Colitis, Ulcerative / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D003625:Data Collection; D003710:Demography; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D013548:Sweden