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NEW YORK (AP) -- Shares of some top health care equipment companies are down at 10 a.m.: Becton Dickinson fell $1.41 or 1.9 percent, to $73.06. Covidien fell $.92 or 2.0 percent, to $44.88. Millipore fell $.12 or .1 percent, to $105.91. Patterson fell $.60 or 1.9 percent, to $30.24. PerkinElmer fell $.53 or 2.3 percent, to $22.78. Thermo Fisher fell $1.05 or 2.0 percent, to $52.71. Varian ...

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