... therapy for symptoms of depression and anxiety: a meta-analysis. Psychol Med 2007, 37(3):319-328.38. Farvolden P, Denisoff E, Selby P, Bagby RM, Rudy L: Usage and longitudinal effectiveness of ... design, in analysis and interpre-tation of data, performed statistical analysis, and participated in the drafting of the manuscript. BL participated in project management, performing of treat-ments ... cost-effectiveness analyses, and participated in the revision of the manuscript. NL participated in the study con-ception, its design and management, analysis of data, interpretation and draft-ing of the manuscript....