1. Agency for Healthcare Research and Quality. Total expenses and percent distribution for selected conditions by type of service: United States, 2011. Med Expend Panel Surv Househ Compon Data. Available from: https://meps.ahrq.gov/data_stats/tables_compendia_hh_interactive.jsp?_SERVICE=MEPSSocket0&_PROGRAM=MEPSPGM.TC.SAS&File=HCFY2011&Table=HCFY2011_CNDXP_C&_Debug.
2. A national poll facing cancer in the health care system;American Cancer Society Cancer Action Network,2010
3. Cancer trends progress report 2011-2012;National Cancer Institute,2012
4. Importance of hospital volume in the overall management of pancreatic cancer;Sosa;Ann Surg,1998
5. Effect of operative volume on morbidity, mortality, and hospital use after esophagectomy for cancer;Swisher;J Thorac Cardiovasc Surg,2000