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"&lt;p&gt;&lt;/p&gt;&lt;p&gt;Dr. Bennet Omalu, who helped discover chronic traumatic encephalopathy (CTE) and linked it to football-specific head trauma, discussed CTE and its believed prominence in NFL players in an interview with &lt;em&gt;Time&lt;/em&gt; published Tuesday.\r\n\r\n&lt;/p&gt;&lt;p&gt;\u201CIn my opinion, taking professional football players as a cohort, I think over 90% of American football players suffer from this disease,\u201D Omalu said. \u201COver 90% of players who play to the professional level have some degree of this disease. I have not examined any brain of a retired football player that came back negative.\u201D\r\n\r\n&lt;/p&gt;&lt;p&gt;Omalu is portrayed in the movie Concussion, set to be released Friday. Actor Will Smith stars as Omalu and depicts the doctor fighting to bring awareness of CTE to the NFL and fighting for the league to take action against the disease.\r\n\r\n&lt;/p&gt;&lt;p&gt;&lt;strong&gt;\u2022 Bengals OT Eric Winston vows to donate brain to concussion research&lt;/strong&gt;\r\n\r\n&lt;/p&gt;&lt;p&gt;In his interview with &lt;em&gt;Time&lt;/em&gt;, Omalu added that the severity of the disease varies from player to player, meaning symptoms can span from mild to severe.\r\n\r\n&lt;/p&gt;&lt;p&gt;\u201CI meet with retired football players. Some are well-dressed, some are well-spoken, but when you talk to them personally they will admit to you that they are having problems,\u201D Omalu said. \u201CBut they are managing their problems. They have impaired memory, they\u2019re having mood problems. They are being treated by their psychiatrists.\u201D\r\n\r\n&lt;/p&gt;&lt;p&gt;Currently, CTE can only be officially diagnosed after a postmortem examination of the brain. However, Omalu insists that the disease can be diagnosed in living individuals \u201Cbased on the continuation of symptoms.\u201D\r\n\r\n&lt;/p&gt;&lt;p&gt;\u201CBut now we, as a pathologists, need more objective measures because symptoms, to a certain degree, are subjective,\u201D Omalu said. \u201CWe need markers: biochemical markets, radiological markers. But we should also realize that radiological markers, biochemical markers wouldn\u2019t give 100% degree of certainly. It is not an absolute science.\u201D\r\n\r\n&lt;/p&gt;&lt;p&gt;&lt;em&gt;- Xandria James&lt;/em&gt;\r\n&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/nfl/2015/12/23/bennet-omalu-cte-professional-football-players>