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Schaller A, Larsson B, Lindblad M, Liedberg GM.Schaller A, et al. Among authors: larsson b.Pain Manag Nurs. 2015 Jun;16(3):336-45. doi: 10.1016/j.pmn.2014.08.010. Epub 2014 Dec 19.Pain Manag Nurs. 2015.PMID: 25532691Free article.