In this 1989 photograph, Thomas Starzl oversees a liver transplant operation at the University of Pittsburgh Medical Center. Starzl won a National Medal of Science in 2004.
Gene J. Puskar/AP
Did revised federal standards make transplant centers more averse to risk and encourage them to drop sicker patients who might affect the hospitals' patient survival rates?
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Dr. Dorry Segev (right), of Johns Hopkins Medicine, led the team of doctors that transplanted an HIV-positive liver and kidney into two different HIV-positive patients this month.
Johns Hopkins Medicine