1. Department of Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Carl Gustav Carus Faculty of Medicine Clinical Sensoring and Monitoring Dresden Saxony Germany
2. Department of Neurosurgery Technische Universität Dresden, Carl Gustav Carus University Hospital Dresden Dresden Saxony Germany
3. Faculty of Electrical and Computer Engineering, Technische Universität Dresden, Institute of Biomedical Engineering Dresden Saxony Germany
4. Department of Neurosurgery Asklepios Kliniken Schildautal Seesen Seesen Saxony Germany