Some experts have cast doubt on whether the statistical analysis used to interpret the data in the study gives an accurate assessment of true risk.

BBC: Breast cancer

Despite the breathless wall-to-wall coverage of every caucus vote cast and the minute-by-minute cable news expert analysis of each and every vote counted in each and every precinct from the three states holding electoral contests last night, the past 24 hours have changed nothing in the Republican contest for the presidential nomination.

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He had a cast-iron reputation for understanding the financial markets, but his analysis would sometimes bring him into conflict with chancellors of the exchequer.

BBC: Obituary: Lord George

Only about 25% of Verizon Wireless customers have V Cast-capable phones, says Avi Greengart, analyst for research firm Current Analysis.

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