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"&lt;a href=\"http://www.tmz.com/person/mia-amber-davis/\"&gt;&lt;strong&gt;Mia Amber Davis&lt;/strong&gt;&lt;/a&gt; -- the big girl from \"&lt;strong&gt;Road Trip&lt;/strong&gt;\" -- officially died from a blood clot in her lungs ... so says the actress' death certificate -- but her husband still believes KNEE SURGERY is to blame. &lt;br /&gt;&lt;br /&gt;&lt;a href=\"http://tmz.vo.llnwd.net/o28/newsdesk/tmz_documents/0708_mia_amber_davis_2.pdf\" target=\"_blank\"&gt;&lt;img src=\"http://ll-media.tmz.com/2011/07/08/0708-mia-amber-doc-launch-ex.jpg\" alt=\"0708_mia_amber_doc_launch_ex\" /&gt;&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;Mia's official cause of death had been a mystery ever since the 36-year-old actress passed away on May 10 ... one day after undergoing a routine knee surgery. &lt;br /&gt;&lt;br /&gt;Now, an UPDATED death certificate has been filed in L.A. County ... listing Mia's primary cause of death as a \"pulmonary thrombo-embolism\" ... which is a blockage in the main artery of the lung. &lt;br /&gt;&lt;br /&gt;But here's where things get murky -- under the line marked, \"significant conditions contributing to death but not resulting in underlying cause\" -- the doctor listed \"LEFT KNEE, OPERATED.\"&lt;br /&gt;&lt;br /&gt;Mia's husband, Michael Yard, asked the Coroner's Officer if it meant she died as a result of the surgery ... but the office said they could not give a definitive answer. &lt;br /&gt;&lt;br /&gt;Yard tells us ... he believes the surgery DID contribute to Mia's death -- claiming she never had any issues with blood clots before she went under the knife. &lt;br /&gt;&lt;br /&gt;&lt;!-- relatedlinks --&gt;&lt;br /&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.tmz.com/2011/07/11/road-trip-actress-mia-amber-davis-knee-surgery-blood-clot-lungs-death-certificate/>