1. 1. The Organ Procurement and Transplantation Network . Donors recovered in the U.S. by type. http://www.optn.org/latestData/rptData.asp. Accessed June 1, 2007.
2. 4. Scientific Registry of Transplant Recipients . Center and OPO specific reports. http://www.ustransplant.org/CSR/current/CSR-Default.aspx. Accessed June 1, 2007.