1. Intracardiac surgery with the aid of a mechanical pump-oxygenator system (Gibbon type);Kirklin;Mayo Clin Proc,1955
2. Medicare,1990
3. To err is human,2000
4. Agency for Healthcare Research and Quality. Available at http://www.ahrq.gov/about/. Accessed January 4, 2005.
5. National Quality Forum. Available at http://www.qualityforum.org/. Accessed January 4, 2005.