title: Editorial: Ulster catharsis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000374:Aggression; D002648:Child; D002657:Child Development; D003863:Depression / Q000209:etiology*; D005639:Frustration; D006801:Humans; D001523:Mental Disorders / Q000453:epidemiology*; D008603:Mental Health; D009660:Northern Ireland; D014754:Violence