title: Acute versus chronic colitis: how and when to distinguish by biopsy.
mesh_terms: D000208:Acute Disease; D002908:Chronic Disease; D003092:Colitis / Q000175:diagnosis*; D003093:Colitis, Ulcerative / Q000175:diagnosis; D003424:Crohn Disease / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans