U.S.

Associated Press
In this Tuesday, Nov. 25, 2014, photo, Alyssa Riggan, who was the first in the United States to successfully receive a liver from a living donor 25 years ago, poses with her husband, Benjamin, in their home in Severn, Md. As Riggan marks the 25th anniversary of her successful surgery on Thursday, she says its success has enabled her to live a normal life almost completely untouched by what was an often-fatal disorder. Riggan was 21 months old when her mother, Teri Smith, donated more than a third of her liver to save her daughter from a disorder called biliary atresia. (AP Photo/ Brian Witte)

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