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APA Citation
Velthorst, E., Koeter, M., van der Gaag, M., Nieman, D. H., Fett, A. J., Smit, F., Staring, A. B. P., Meijer, C., & de Haan, L. (2015). adapted cognitive–behavioural therapy required for targeting negative symptoms in schizophrenia: meta-analysis and meta-regression. Psychological medicine, 45(3), 453–465. http://access.bl.uk/ark:/81055/vdc_100029265916.0x000011