Some epidemiological features of ulcerative colitis and regional enteritis. A preliminary report.
D001741:Black or African American; D044383:Black People; D003093:Colitis, Ulcerative / Q000453:epidemiology*; D003424:Crohn Disease / Q000453:epidemiology*; D006306:Health Surveys; D006801:Humans; D007585:Jews; D008396:Maryland; D009664:Norway; D006113:United Kingdom; D044465:White People