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Vlaeyen JW, De Jong JR, Onghena P, Kerckhoffs-Hanssen M, Kole-Snijders AM.Vlaeyen JW, et al.Pain Res Manag. 2002 Fall;7(3):144-53. doi: 10.1155/2002/493463.Pain Res Manag. 2002.PMID: 12420023Clinical Trial.