1. American Joint Committee on Cancer (2002) American Joint Committee on Cancer (AJCC) Cancer staging manual 6th edition
2. North American Association of Central Cancer Registries. Accessed January 10, 2012; Available from: http://www.naaccr.org/
3. Surveillance Epidemiology and End Results (SEER). Accessed December 15, 2011; Available from: http://seer.cancer.gov/
4. SEER Summary Staging Manual 2000: Codes and coding instructions. In: Young JL Jr et al. (eds) National Institutes of Health: Bethesda, MD
5. Oehrli MD, Quesenberry CP, Leyden WA (2011) 2011 Annual report on trends, incidence, and outcomes. Kaiser Permanente, Northern California Cancer Registry, December 2011