title: Flat polyps depress gastroenterologists.
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Hanauer
mesh_terms: D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D004733:Enema; D006801:Humans; D007417:Intestinal Polyps / Q000175:diagnosis*; D008403:Mass Screening / Q000379:methods