Living kidney donors Bill Singleton, from left, Lucien Boyd, Sylvia Glaser, Kelvina Hudgens, Pamela Hull and Tom Otten, attend a news conference at Georgetown University Hospital in Washington, Tuesday, Dec. 15, 2009. The donors are part of a record-setting marathon 13-way kidney swap, a pioneering effort to expand transplants to patients who too often never qualify.
(AP Photo/Manuel Balce Ceneta)