| http://www.w3.org/ns/prov#value | - Unfortunately, despite its prevalence, low back pain???or more precisely, the source of that pain???can be surprisingly tough to diagnose, Dr. Liu says. ???The causes of back pain are often very complex,??? he says, ???and people are very different in their response to pain.??? For example, an injury such as a fall or a spinal condition such as a herniated disc might leave one person in serious pa
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