1. The prevention of invasive cancer of the rectum;Gilbertsen, V.A.; Nelms, J.M.;Cancer,1978
2. Quality of barium enemas;Williams, C.B.; Nishigami, T.;Lancet,1983
3. Flexible fiberoptic sigmoidoscopy and double contrast barium enema examination in the identification of adenomas and carcinomas of the colon;Farrands, P.A.; Vellacott, K.D.; Amar, S.S.; Balfour, T.W.; Hardcastle, J.D.;Dis Colon Rectum,1983
4. Colonoscopy findings in symptomatic patients without X-ray evidence of colonic neoplasms;Aldridge, M.C.; Sim, A.J.W.;Lancet,1986
5. Is colonoscopy necessary in diverticular disease?;Boulos, P.B.; Karamanolis, D.G.; Salmon, P.R.; Clark, C.G.;Lancet,1984