Cancer rates triple among New York police officers who responded to 9/11

Cancer rates triple among New York police officers who responded to 9/11
Cancer rates among police officers who responded to the 9/11 terrorist attacks on New York have tripled, according to new figures.
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http://www.telegraph.co.uk/news/worldnews/september-11-attacks/9064530/911-Cancer-rates-triple-among-New-York-NYPD-officers-who-responded-to-al-Qaeda-attack-on-World-Trade-Center.html