Randomized controlled trial of interventions designed to reduce the risk of progression to first-episode psychosis in a clinical sample with subthreshold symptoms - McGorry, PD; Yung, AR; Phillips, LJ; Yuen, HP; Francey, S; Cosgrave, EM; Germano, D; Bravin, J; McDonald, T; Blair, A; Adlard, S; Jackson, H (Archives of General Psychiatry, 2002)