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APA Citation
Tibber, M. S., Kirkbride, J. B., Joyce, E. M., Mutsatsa, S., Harrison, I., Barnes, T. R., & Huddy, V. (2018). the component structure of the scales for the assessment of positive and negative symptoms in first-episode psychosis and its dependence on variations in analytic methods. Psychiatry research, 270, 869–879. http://access.bl.uk/ark:/81055/vdc_100074729130.0x000050