title: Nonpolypoid colorectal neoplasia in the United States: the parachute is open.
authors.forename: David
authors.initials: D
authors.lastname: Lieberman
mesh_terms: D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000453:epidemiology* / Q000473:pathology*; D006801:Humans; D014481:United States / Q000453:epidemiology