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Martin S, Nelson Schmitt S, Wolters PL, Abel B, Toledo-Tamula MA, Baldwin A, Wicksell RK, Merchant M, Widemann B.Martin S, et al. Among authors: wicksell rk.Pain Med. 2015 Feb;16(2):367-73. doi: 10.1111/pme.12620. Epub 2014 Nov 6.Pain Med. 2015.PMID: 25377441Free PMC article.