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NEW YORK (AP) -- Shares of some top health care equipment companies are down at noon: Becton Dickinson fell $1.23 or 1.7 percent, to $73.24. Covidien fell $1.45 or 3.2 percent, to $44.35. Millipore fell $.12 or .1 percent, to $105.91. Patterson fell $.72 or 2.3 percent, to $30.12. PerkinElmer fell $.75 or 3.2 percent, to $22.56. Thermo Fisher fell $1.54 or 2.9 percent, to $52.22. Varian Medical ...

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