He hit a low when he suffered a kidney problem prior to the 2004 Olympics, although he recovered to make the semi-finals in Athens.

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But a second pass of the data presented at the meeting of the American Heart Association last November revealed a more specific problem: kidney injury.

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Finding a place for the former Ireland Schools and under-20 star was Kidney's major problem after the player showed his prowess in a number of positions.

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Adding a sweet substance solves the problem of liver and kidney toxicity, allowing him to deliver safely a far more potent dose of relief that he suspects may target the COX-3 enzyme.

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Dr Charlie Tonson, chairman of the Royal College of Physicians renal medicine committee, said chronic kidney disease was an important public health problem.

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This is not just a U.S. problem: The World Health Organization estimates that barely one in ten people worldwide who need kidney transplants actually get them.

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