title: [Fecal blood--hemorrhoids do not "protect" from colonoscopy].
authors.forename: Peter
authors.initials: P
authors.lastname: Stiefelhagen
mesh_terms: D003113:Colonoscopy; D003131:Combined Modality Therapy; D003937:Diagnosis, Differential; D006484:Hemorrhoids / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D009780:Occult Blood; D012812:Sigmoidoscopy