1. editors: To err is human: Building a safer health system. Washington, DC: National Academies Press; 2000.
2. National Patient Safety Goals. Joint Commission on Accreditation of Healthcare Organization. 2004. www.jcaho.org/accredited+ organization/patient+safety.
3. Code of Federal Regulations. Title 42 CFR Parts 493 to end. Washington, DC: US Government Printing Office; 1998. (revised annually).
4. Food and Drug Administration. Guideline for quality assurance in blood establishments. Docket #91N-0450, Rockville, MD: CBER Office of Communication, Training, and Manufacturer's Assistance; 1995.