1. Use of intensive care at the end of life in the United States: an epidemiologic study;Angus;Crit Care Med,2004
2. Critical care medicine in the United States 1985–2000: an analysis of bed numbers, use, and costs;Halpern;Crit Care Med,2004
3. Trends in Medicare payments in the last year of life;Lubitz;N Engl J Med,1993
4. Long-term trends in Medicare payments in the last year of life;Riley;Health Serv Res,2010
5. Centers for Medicare & Medicaid Services. National Health Expenditures 2013 Highlights. Available at: http://www.cms.gov/Research-Statistics-Data-and-Systems/Statistics-Trends-and-Reports/NationalHealthExpendData/Downloads/highlights.pdf. Unknown original publication date. Accessed January 11, 2015.