1. Office of Cancer Survivorship, National Cancer Institute http://www.cancercontrol.cancer.gov/ocs/definitions.html 2010
2. Office of Cancer Survivorship, National Cancer Institute http://www.cancercontrol.cancer.gov/ocs/prevalence/index.html 2010
3. Cancer survivorship-United States, 1971-2001;Rowland;MMWR Weekly,2004