1. Colorectal cancer in young patients;Lee;Am Surg,1994
2. Colorectal cancer in patients aged less than 40 years;Varma;J Am Board Fam Pract,1990
3. Racial/Ethnic Patterns of Cancer in the United States 1988–1992 (NIH Publication No. 96-4104),1996
4. America Cancer Society. Cancer facts and figures 2002. New York: American Cancer Society Surveillance Research, 2002; (02-250M-No 5008.02:20-6)
5. Prevention of colorectal cancer by once-only sigmoidoscopy;Atkin;Lancet,1993