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