Tait, L; Lester, H; Birchwood, M; Freemantle, N; Wilson, S; (2005) Design of the BiRmingham Early Detection In untREated psyChosis Trial (REDIRECT): cluster randomised controlled trial of general practitioner education in detection of first episode psychosis [ISRCTN87898421]. BMC Health Services Research , 5 , Article 19. 10.1186/1472-6963-5-19.