1. Cancer statistics, 1999
2. National Cancer Institute, Division of Cancer Prevention and Control, Surveillance Program, Cancer Statistics Branch. Surveillance, Epidemiology, and End Results (SEER) Program public use CD-ROM (1973-1996). Bethesda, MD: National Cancer Institute; 1999.
3. eds. World Health Organization. International classification of diseases for oncology, 2nd ed. Geneva: World Health Organization; 1990. p 15.
4. Statistical m;Breslow,1980