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Irving GA, Backonja MM, Dunteman E, Blonsky ER, Vanhove GF, Lu SP, Tobias J; NGX-4010 C117 Study Group.Irving GA, et al.Pain Med. 2011 Jan;12(1):99-109. doi: 10.1111/j.1526-4637.2010.01004.x. Epub 2010 Nov 18.Pain Med. 2011.PMID: 21087403Clinical Trial.