1. Department of Anaesthesiology and Intensive Care Medicine, Charité University Berlin, Campus Virchow Klinikum and Campus Charite Mitte, Berlin, Germany
2. Department of Anaesthesiology, Universitätsklinikum Hamburg Eppendorf, Hamburg, Germany
3. Integrative Neuroscience Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland
4. Department of Clinical Physiology, Charité University Berlin, Campus Benjamin Franklin, Berlin, Germany
5. Department of Psychiatry and Psychotherapy, Charité University Berlin, Campus Charite Mitte, Berlin, Germany
6. Department of Anatomy, Ludwig-Maximilian-University, Munich, Germany