Raleigh VS, Irons R, Hawe E, Scobie S, Cook A, Reeves R, Petruckevitch A, Harrison J. Ethnic variations in the experiences of mental health service users in England: results of a national patient survey programme. Br J Psychiatry. 2007;191:304-12.
Hartman M, Bolton E, Fehnel SE. Accounting for age differences on the Wisconsin Card Sorting Test: decreased working memory, not inflexibility. Psychol Aging. 2001 Sep 1;16(3):385-99.
Munro J, O'Sullivan D, Andrews C, Arana A, Mortimer A, Kerwin R. Active monitoring of 12,760 clozapine recipients in the UK and Ireland. Beyond pharmacovigilance. Br J Psychiatry. 1999 Dec;175:575-80. doi: 10.1192/bjp.175.6.576