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2. Flexible fiberoptic sigmoidoscopy in family medicine;Hocutt;Am Fam Physician,1984
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4. Flexible versus rigid sigmoidoscopy: a comparison using an inexpensive 35-cm flexible proctosigmoidoscope;Grobe;Am J Gastroenterol,1983
5. A new flexible sigmoidoscope for the generalist;Winawer;Gastrointest Endosc,1982