Warning News - 25 Jul 2011  
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A study of over 1,500 teenagers by US researchers, published in the July 2011 issue of Archives of Otolaryngology found that youths exposed to second-hand smoke are twice as likely to have hearing loss, especially in the range of frequencies that are important for understanding speech.

http://www.doctorslounge.com/index.php/news/pb/21725
http://www.webmd.com/smoking-cessation/news/20110718/secondhand-smoke-may-hurt-teens-hearing
http://www.presstv.ir/detail/189826.html

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