title: Sigmoidoscopy or colonoscopy: which way are we headed?
authors.forename: D K
authors.initials: DK
authors.lastname: Rex
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D008875:Middle Aged; D012007:Rectum; D012812:Sigmoidoscopy