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Steenkamp MM, Litz BT.Steenkamp MM, et al. Among authors: litz bt.Clin Psychol Rev. 2013 Feb;33(1):45-53. doi: 10.1016/j.cpr.2012.10.002. Epub 2012 Oct 13.Clin Psychol Rev. 2013.PMID: 23123570Review.