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Ris I, Juul-Kristensen B, Boyle E, Kongsted A, Manniche C, Søgaard K.Ris I, et al. Among authors: boyle e.Scand J Pain. 2017 Jan;14:1-8. doi: 10.1016/j.sjpain.2016.08.008. Epub 2016 Oct 12.Scand J Pain. 2017.PMID: 28850421Free article.Clinical Trial.