1. Department of Neurosurgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
2. Department of Neurology and Neurorehabilitation, Cantonal Hospital Lucerne, Lucerne, Switzerland
3. Section of Neuroradiology, Cantonal Hospital Lucerne, Lucerne, Switzerland
4. Department of Intensive Care Medicine, Cantonal Hospital Lucerne, Lucerne, Switzerland