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Harvest plot of all included studies (N = 18) which presented outcomes at the patient level. Depicted are the effect sizes Cohen's d (standard mean differences with 95% confidence intervals). Colours of bars are categorised as follows: (i) white: schizophrenia, (ii) dark grey: bipolar disorder, (iii) light grey: depressive disorder, (iv) black: mixed disorders and (v) vertical stripes: alcohol use disorder
