[Non-dysenteric severe ulcerative colitis as a disease of a large city].
D003092:Colitis; D003093:Colitis, Ulcerative / Q000453:epidemiology*; D005767:Gastrointestinal Diseases; D006801:Humans
COLITIS, ULCERATIVE/epidemiology
Ist die Colitis ulcerosa gravis non dysenterica eine Grosstadt-Krankheit?