1. Cancer statistics, 1990;Silverberg;CA,1990
2. Routine screening for prostate cancer using the digital rectal examination;Chodak;Prog. Clin Biol Res,1988
3. Screening for colorectal cancer;Winawer,1987
4. Colon cancer control study: An interim report;Gilbertsen,1980
5. Controlled trial of fecal occult blood testing in the detecting of colorectal cancer;Hardcastle;Lancet,1983