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Zucca A, Sanson-Fisher R, Waller A, Carey M, Fradgley E, Regan T.Zucca A, et al.J Pain Symptom Manage. 2015 Oct;50(4):436-44. doi: 10.1016/j.jpainsymman.2015.04.018. Epub 2015 May 27.J Pain Symptom Manage. 2015.PMID: 26025275Free article.