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New Study Links Mobile Phones With Benign Tumors By MATT MOORE     STOCKHOLM, Sweden (AP) -- A new Swedish study suggests that people who use a mobile phone for at least 10 years might increase their risk of developing a rare benign tumor along a nerve on the side of the head where they hold the phone.    In an interview with The Associated Press on Thursday, one of the researchers behind the preliminary study, Anders Ahlbom, said the results were surprising and need to be confirmed by more research... 