title: Quality colonoscopy. Preface.
authors.forename: John I
authors.initials: JI
authors.lastname: Allen
mesh_terms: D003113:Colonoscopy / Q000191:economics*; D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000517:prevention & control; D055088:Early Detection of Cancer; D006801:Humans; D011787:Quality of Health Care