Authors: Lammertink, M Lohrer, F Kaiser, R Hambrecht, M Pukrop, R

Citation: M. Lammertink et al., Differences in substance abuse patterns: multiple drug abuse alone versus schizophrenia with multiple drug abuse, ACT PSYC SC, 104(5), 2001, pp. 361-366

Authors: Hambrecht, M Hafner, H

Citation: M. Hambrecht et H. Hafner, Cannabis, vulnerability, and the onset of schizophrenia: an epidemiological perspective, AUST NZ J P, 34(3), 2000, pp. 468-475

Authors: Hafner, H Loffler, W Maurer, K Hambrecht, M an der Heiden, W

Citation: H. Hafner et al., Depression, negative symptoms, social stagnation and social decline in theearly course of schizophrenia, ACT PSYC SC, 100(2), 1999, pp. 105-118