OPUS study: suicidal behaviour, suicidal ideation and hopelessness among patients with first-episode psychosis. One-year follow-up of a randomised controlled trial. - Nordentoft,M.; Jeppesen,P.; Abel,M.; Kassow,P.; Petersen,L.; Thorup,A.; Krarup,G.; Hemmingsen,R.; Jorgensen,P. (Br J Psychiatry, 2002)