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Cuijpers, Pim; Driessen, Ellen; Hollon, Steven D; van Oppen, Patricia; Barth, Jürgen; Andersson, Gerhard (2012). The efficacy of non-directive supportive therapy for adult depression: A meta-analysis. Clinical psychology review, 32(4), pp. 280-291. New York, N.Y.: Elsevier Science 10.1016/j.cpr.2012.01.003
