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Barnes, T. R., Leeson, V. C., Mutsatsa, S. , Watt, H. C., Hutton, S. B. & Joyce, E. M. (2008). Duration of untreated psychosis and social function: 1-year follow-up study of first-episode schizophrenia.. The British Journal of Psychiatry, 193(3), pp. 203-209. doi: 10.1192/bjp.bp.108.049718
Harrison, I., Joyce, E. M., Mutsatsa, S. , Hutton, S. B., Huddy, V., Kapasi, M. & Barnes, T. R. (2008). Naturalistic follow-up of co-morbid substance use in schizophrenia: the West London first-episode study. Psychological Medicine, 38(1), pp. 79-88. doi: 10.1017/S0033291707000797