Affiliation: | (1) Department of Neurosurgery, University Clinics Rudolf Virchow, Free University of Berlin, Fed. Rep. of Germany;(2) Department of Radiology, University Clinics Rudolf Virchow, Free University of Berlin, Fed. Rep. of Germany;(3) Institute of Neuropathology, Klinikum Steglitz, Free University of Berlin, Fed. Rep. of Germany |