Steven Nissen, the chairman of cardiology at the Cleveland Clinic and head of the American College of Cardiology, will present one key study that will use ultrasound probes to measure the effect of torcetrapib on plaque in the coronary arteries at the ACC meeting in New Orleans next March.

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The study subjects also saw their cholesterol levels - another key heart risk indicator - more than halved on average.

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Key to the panel's decision: The study didn't prove that the patients on Arimidex survived longer.

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At the beginning of each week, the author of a case study will present a brief document describing the key policy concerns faced by the institution and inviting the participants to comment on a number of issues or questions.

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