A new guideline issued by the American Academy of Neurology finds that transcutaneous electric nerve stimulation (TENS), a widely used pain therapy involving a portable device, is not recommended to treat chronic low-back pain pain that has persisted for three months or longer because research shows it is not effective. The guideline is published in the December 30, 2009, online issue of Neurology®, the medical journal of the American Academy of Neurology...
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