Methods of search

The search strategy [Psoria* or "Acrodermatitis continua of Hallopeau" or (Impetigo and herpetiformis) or ((Palm* or Plant* or Sole* or Bacterid) and (Pustul* or Psoria*)) or Acropustulosis] was used to search the Cochrane Central Register of Controlled Trials (Issue 3, 2001) and the European Dermato-Epidemiology Network (EDEN) database of psoriasis trials, and filtered using the Cochrane optimal search strategy for randomised controlled trials (RCTs),10 Medline and Embase (both to August 2001). The results were crosschecked against the Salford Database of Psoriasis Trials developed for the systematic review published in 2000.11

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