| http://www.w3.org/ns/prov#value | - The use of opioid pain medicin...Three Clinical Presentations on Tapentadol Extended Release Tablets for Chronic Pain Featured at 2009 American Pain Society Annual Meeting Safety and Efficacy Data from Phase 3 Study will be Highlighted SAN DIEGO, May 7 /PRNewswire-USNewswire/ -- Chronic pain is a significant medical challenge in the United States, and chronic low back pain is the most common cause
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