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　　When Matthew Jones decided to donate a kidney(肾)to a stranger, the Michigan father of five had no idea he'd be starting a life-saving, "pay-it-forward" chain．

　　His kidney donation to a Phoenix woman in 2007 set off a long-running organ donation that resulted in 10 sick people getting new kidneys over a year．It hasn't ended yet．

　　Jones, who lives in Petoskey, Michigan, heard a news report about a man giving a kidney to a stranger and thought he'd like to do that, too．He worked with a transplant center in Buffalo, NY, but no match worked out．

　　He ultimately(最后)was referred to Dr Michael Rees, a transplant surgeon at University of Toledo Nedical Center, who was trying to design an advanced living-donor pairing system．

　　It paired the 30-year-old Jones with Barb Bunnell, a 53-year-old Arizona woman whose husband wanted to donate a kidney to her but was incompatible．

　　Just after the July 18, 2007 surgery, Jones recalls feeling "like a truck had run over me"．But he was well enough to go to a Diamondbacks baseball game five days later．

　　Bunnell's grateful husband, Ron, then became what Rees believes is the world's first "bridge" donor, meaning he donated his kidney later．

　　Ron Bunnell was on a plane a week later to give his kidney to a 32-year-old Toledo woman, Angie Heckman．She's a waitress at a bar owned by her mother, Laurie Sarvo．Sarvo then gave a kidney to a woman in Columbus, Ohio, whose daughter then became the fourth donor in the chain．

　　On it ran through patient-donor pairs including two more married couples, a daughter and father, and two friends．The last operation was done last March, with a 60-year-old woman in Toledo getting a kidney from a Baltimore donor．That recipient's daughter wants to donate a kidney, but a match hasn't worked out yet．

　　"There's a very good possibility that when I'm dead and gone, this chain will still be going on," Jone said．