title: Are two tests better than one?
authors.forename: James D
authors.initials: JD
authors.lastname: Lewis
mesh_terms: D018256:Adenomatous Polyps / Q000175:diagnosis*; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D006801:Humans; D008403:Mass Screening / Q000379:methods* / Q000592:standards