“…We are grateful to Rita Frantska, Jutta Haverkorn, Mark Pearson, and Robert Windelschmitt for technical assistance, to Dr. Philip Ward and Dr. Sally Andrews for discussion and to the Deutsche Forschungsgemeinschaft (DFG Scha 628r4-1) for financial support. Preliminary results were presented on the 8th Winter Work-shop on Schizophrenia (Bender et al, 1996) where S.B. received a Young Scientist Award.…”