1. Organization for Economic Cooperation and Development (2009) OECD health data 2009: how does the United States compare. http://www.oecd.org/dataoecd/46/2/38980580.pdf . Accessed on 7 May 2010
2. Congress of the United States Congressional Budget Office (2009) The long-term outlook for health care spending. http://www.cbo.gov/ftpdocs/87xx/doc8758/11-13-LT-Health.pdf . Accessed on 7 May 2010
3. Iglehart JK (2006) The new era of medical imaging—progress and pitfalls. N Engl J Med 354:2822–2828
4. Central Intelligence Agency (2009) The world factbook—infant mortality rate. https://www.cia.gov/library/publications/the-world-factbook/rankorder/2091rank.html . Accessed on 7 May 2010
5. Institute of Medicine (1999) To err is human: building a safer health care system. National Academy Press, Washington, DC