Study finds deaths of Zilmax-fed cattle dwarf Merck's official reports to FDA

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As new research findings indicate, the number of U.S. cattle deaths linked to Zilmax could reach into the thousands. That&#39;s far higher than the figures Merck reported to the FDA,<em> Reuters</em> reports. And it could seriously interfere with Merck&#39;s plans to relaunch the $160 million growth-stimulating drug.