That's because if you do enough data analyses on a drug, even one that doesn't work at all, you can eventually find a group in which the drug appears to be effective--entirely by chance.

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Wake Forest's Furberg says further analyses of the data that are now ongoing are only likely to further weaken the claim that there is a delay in Vioxx's affect on the heart.

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But detailed analyses of micro market data, such as Mr Jensen's study, demonstrate that phones really do make people better off.

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He said the company is "conducting additional analyses and reviewing the data" in order to further understand the drug's safety profile.

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