1. The National Cancer Data Base report on hospital reporting;Jesup;Cancer,1996
2. SteeleGD,JessupHM,WinchesterDP,MenckHR,MurphyJP, editors. National Cancer Data Base annual review of patient care, 1995. Atlanta, GA: American Cancer Society; 1995.
3. The National Cancer Data Base report on cancer of the head and neck;Hoffman;Arch Otolaryngol Head Neck Surg,1998
4. U.S. Census Bureau. Geographic Comparison Table. 5-digit ZIP code tabulation area. U.S. Census bureau, census 2000 summary file 3, matrices P53, P77, P82, P87, P90, PCT47, and PCT52. Available at http://factfinder.census.gov.