1. Emergency department crowding as a health policy issue: past development, future direction;Richardson;Ann Emerg Med,2002
2. Crisis in the emergency department;Kellerman;N Engl J Med,2006
3. Institute of Medicine of the National Academies, Committee on the Future of Emergency Care in the United States Health System, Board on Health Care Services. The Evolving Role of Hospital-Based Emergency Care. Future of Emergency Care: Hospital-Based Emergency Care at the Breaking Point (Prepublication Copy: Uncorrected Proofs) Washington, DC: National Academies Press; 2006 pp 29-63.
4. United States General Accounting Office. Hospital Emergency Departments; Crowded Conditions Vary among Hospitals and Communities (GAO-03-460), 2003. Available at: http://www.gao.gov/new.items/d03460.pdf. Accessed Nov 11, 2006.