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Associated Press
In this Friday, June 8, 2012 photo, a sign is posted for "quiet time" while Nursing Director Theresa Capodilupo works under dimmed lighting in the hall of the Surgical Trauma Unit at the Massachusetts General Hospital in Boston. Anyone who's had a hospital stay knows the beeping monitors, the pagers and phones, the hallway chatter, the roommate, even the squeaky laundry carts all make for a not-so-restful place to heal. Hospitals need a prescription for quiet, and new research suggests it may not be easy to tamp down all the noise for a good night's sleep.  (AP Photo/Elise Amendola)

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