1. From the Department of Neurosurgery (Drs Winkler, Goldammer, Meixensberger)
2. Department of Ear, Nose, and Throat (Dr Oeken); Leipzig, Germany
3. Department of Diagnostic Radiology (Dr Richter); Leipzig, Germany
4. Department of Neuropathology (Dr Geiger); Leipzig, Germany
5. Department of Anaesthesiology and Intensive Care (Dr Wiegel), University of Leipzig.