If you were curious to where I got my information.....

• BBC News | HEALTH | Artificial liver 'could be grown'. (2002, April 25). BBC NEWS | News Front Page. Retrieved May 17, 2010, from http://news.bbc.co.uk/2/hi/health/1949073.stm
• Trivedi, B. P. (2002, January 3). Cloned Pigs Modified for Use in Human Transplants.Daily Nature and Science News and Headlines | National Geographic News. Retrieved May 17, 2010, from http://news.nationalgeographic.com/news/2002/01/0103_020103TVclonedpig.html
  
  
  Beschorner, W. E. (2010, January 14). Xenotransplantation: eMedicine Pediatrics: Surgery. eMedicine - Medical Reference. Retrieved May 17, 2010, from http://emedicine.medscape.com/article/1014080-overview
  
  
  Xenotransplantation. (2010, February 4). U S Food and Drug Administration Home Page. Retrieved May 17, 2010, from http://www.fda.gov/BiologicsBloodVaccines/Xenotransplantation/default.htm
  
  
  Henderson, M. (2009, June 3). Transplant of pig organs into humans closer after stem cell breakthrough - Times Online . Times Online | News and Views from The Times and Sunday Times . Retrieved May 17, 2010, from http://www.timesonline.co.uk/tol