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The Transplant List Grows Longer

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There are new technologies to "grow" organs for transplant -- literally -- from the ground up by using primitive "stem cells" as building blocks. So-called "xenotransplants" would genetically modify organs from pigs and adapt them to humans.

"These high-tech ... solutions to the organ shortage, I would love to see one make a significant impact, but I don't think it's practical for us to depend on that," says Nelson, who's also chairman of the UNOS ethics committee.

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