People with failing organs are turning to Facebook to drum up publicity and find potential donors, in a trend that some health care professionals fear could subvert the existing organ-allocation system. "It's not hard to imagine that if you're attractive and young and appealing, it's easier to get people to donate to you than if you're short or ugly or have a hunchback. And that's not the way we want the system to work," transplant surgeon Michael Shapiro says.

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