| http://www.w3.org/ns/prov#value | - Similar studies have been performed in which the MRI???s of volunteers with no back pain, showed that roughly 40 percent to 50 percent of people over age 50 have a herniated disc on the MRI. These findings on MRI are in the absence of any clinical findings such as knee pain or back pain, and as such, are considered ???normal variants.???
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