1. Mortality in schizophrenia;Allebeck;Arch Gen Psychiatry,1986
2. The Scale for the Assessment of Negative Symptoms (SANS);Andreasen,1983
3. The Scale for the Assessment of Positive Symptoms (SAPS);Andreasen,1984
4. Cannabis and schizophrenia;Andreasson;Lancet,1987
5. Epidemiology of schizophrenia;Angst,1991