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Cumulative improvement in PASI response (events: PASI 50, PASI 75 and PASI 90) by treatment group: (a) FAE monotherapy, (b) FAEs + phototherapy and (c) FAEs + MTX. Kaplan–Meier failure curves with the number of patients ‘at risk’ (on therapy) in each group and 95% Hall–Wellner bands.
